1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /**************************************************************************/ 3 /* */ 4 /* IBM System i and System p Virtual NIC Device Driver */ 5 /* Copyright (C) 2014 IBM Corp. */ 6 /* Santiago Leon (santi_leon@yahoo.com) */ 7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 8 /* John Allen (jallen@linux.vnet.ibm.com) */ 9 /* */ 10 /* */ 11 /* This module contains the implementation of a virtual ethernet device */ 12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 13 /* option of the RS/6000 Platform Architecture to interface with virtual */ 14 /* ethernet NICs that are presented to the partition by the hypervisor. */ 15 /* */ 16 /* Messages are passed between the VNIC driver and the VNIC server using */ 17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 18 /* issue and receive commands that initiate communication with the server */ 19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 20 /* are used by the driver to notify the server that a packet is */ 21 /* ready for transmission or that a buffer has been added to receive a */ 22 /* packet. Subsequently, sCRQs are used by the server to notify the */ 23 /* driver that a packet transmission has been completed or that a packet */ 24 /* has been received and placed in a waiting buffer. */ 25 /* */ 26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 27 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 28 /* or receive has been completed, the VNIC driver is required to use */ 29 /* "long term mapping". This entails that large, continuous DMA mapped */ 30 /* buffers are allocated on driver initialization and these buffers are */ 31 /* then continuously reused to pass skbs to and from the VNIC server. */ 32 /* */ 33 /**************************************************************************/ 34 35 #include <linux/module.h> 36 #include <linux/moduleparam.h> 37 #include <linux/types.h> 38 #include <linux/errno.h> 39 #include <linux/completion.h> 40 #include <linux/ioport.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kernel.h> 43 #include <linux/netdevice.h> 44 #include <linux/etherdevice.h> 45 #include <linux/skbuff.h> 46 #include <linux/init.h> 47 #include <linux/delay.h> 48 #include <linux/mm.h> 49 #include <linux/ethtool.h> 50 #include <linux/proc_fs.h> 51 #include <linux/if_arp.h> 52 #include <linux/in.h> 53 #include <linux/ip.h> 54 #include <linux/ipv6.h> 55 #include <linux/irq.h> 56 #include <linux/kthread.h> 57 #include <linux/seq_file.h> 58 #include <linux/interrupt.h> 59 #include <net/net_namespace.h> 60 #include <asm/hvcall.h> 61 #include <linux/atomic.h> 62 #include <asm/vio.h> 63 #include <asm/iommu.h> 64 #include <linux/uaccess.h> 65 #include <asm/firmware.h> 66 #include <linux/workqueue.h> 67 #include <linux/if_vlan.h> 68 #include <linux/utsname.h> 69 70 #include "ibmvnic.h" 71 72 static const char ibmvnic_driver_name[] = "ibmvnic"; 73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 74 75 MODULE_AUTHOR("Santiago Leon"); 76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 77 MODULE_LICENSE("GPL"); 78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 79 80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 81 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 82 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 83 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 84 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 85 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 86 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 87 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 88 static int enable_scrq_irq(struct ibmvnic_adapter *, 89 struct ibmvnic_sub_crq_queue *); 90 static int disable_scrq_irq(struct ibmvnic_adapter *, 91 struct ibmvnic_sub_crq_queue *); 92 static int pending_scrq(struct ibmvnic_adapter *, 93 struct ibmvnic_sub_crq_queue *); 94 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 95 struct ibmvnic_sub_crq_queue *); 96 static int ibmvnic_poll(struct napi_struct *napi, int data); 97 static void send_query_map(struct ibmvnic_adapter *adapter); 98 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8); 99 static int send_request_unmap(struct ibmvnic_adapter *, u8); 100 static int send_login(struct ibmvnic_adapter *adapter); 101 static void send_query_cap(struct ibmvnic_adapter *adapter); 102 static int init_sub_crqs(struct ibmvnic_adapter *); 103 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 104 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 105 static void release_crq_queue(struct ibmvnic_adapter *); 106 static int __ibmvnic_set_mac(struct net_device *, u8 *); 107 static int init_crq_queue(struct ibmvnic_adapter *adapter); 108 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 109 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 110 struct ibmvnic_sub_crq_queue *tx_scrq); 111 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 112 struct ibmvnic_long_term_buff *ltb); 113 114 struct ibmvnic_stat { 115 char name[ETH_GSTRING_LEN]; 116 int offset; 117 }; 118 119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 120 offsetof(struct ibmvnic_statistics, stat)) 121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) 122 123 static const struct ibmvnic_stat ibmvnic_stats[] = { 124 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 125 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 126 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 127 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 128 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 129 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 130 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 131 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 132 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 133 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 134 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 135 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 136 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 137 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 138 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 139 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 140 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 141 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 142 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 143 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 144 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 145 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 146 }; 147 148 static int send_crq_init_complete(struct ibmvnic_adapter *adapter) 149 { 150 union ibmvnic_crq crq; 151 152 memset(&crq, 0, sizeof(crq)); 153 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 154 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 155 156 return ibmvnic_send_crq(adapter, &crq); 157 } 158 159 static int send_version_xchg(struct ibmvnic_adapter *adapter) 160 { 161 union ibmvnic_crq crq; 162 163 memset(&crq, 0, sizeof(crq)); 164 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 165 crq.version_exchange.cmd = VERSION_EXCHANGE; 166 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 167 168 return ibmvnic_send_crq(adapter, &crq); 169 } 170 171 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 172 unsigned long length, unsigned long *number, 173 unsigned long *irq) 174 { 175 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 176 long rc; 177 178 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 179 *number = retbuf[0]; 180 *irq = retbuf[1]; 181 182 return rc; 183 } 184 185 /** 186 * ibmvnic_wait_for_completion - Check device state and wait for completion 187 * @adapter: private device data 188 * @comp_done: completion structure to wait for 189 * @timeout: time to wait in milliseconds 190 * 191 * Wait for a completion signal or until the timeout limit is reached 192 * while checking that the device is still active. 193 */ 194 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 195 struct completion *comp_done, 196 unsigned long timeout) 197 { 198 struct net_device *netdev; 199 unsigned long div_timeout; 200 u8 retry; 201 202 netdev = adapter->netdev; 203 retry = 5; 204 div_timeout = msecs_to_jiffies(timeout / retry); 205 while (true) { 206 if (!adapter->crq.active) { 207 netdev_err(netdev, "Device down!\n"); 208 return -ENODEV; 209 } 210 if (!retry--) 211 break; 212 if (wait_for_completion_timeout(comp_done, div_timeout)) 213 return 0; 214 } 215 netdev_err(netdev, "Operation timed out.\n"); 216 return -ETIMEDOUT; 217 } 218 219 /** 220 * reuse_ltb() - Check if a long term buffer can be reused 221 * @ltb: The long term buffer to be checked 222 * @size: The size of the long term buffer. 223 * 224 * An LTB can be reused unless its size has changed. 225 * 226 * Return: Return true if the LTB can be reused, false otherwise. 227 */ 228 static bool reuse_ltb(struct ibmvnic_long_term_buff *ltb, int size) 229 { 230 return (ltb->buff && ltb->size == size); 231 } 232 233 /** 234 * alloc_long_term_buff() - Allocate a long term buffer (LTB) 235 * 236 * @adapter: ibmvnic adapter associated to the LTB 237 * @ltb: container object for the LTB 238 * @size: size of the LTB 239 * 240 * Allocate an LTB of the specified size and notify VIOS. 241 * 242 * If the given @ltb already has the correct size, reuse it. Otherwise if 243 * its non-NULL, free it. Then allocate a new one of the correct size. 244 * Notify the VIOS either way since we may now be working with a new VIOS. 245 * 246 * Allocating larger chunks of memory during resets, specially LPM or under 247 * low memory situations can cause resets to fail/timeout and for LPAR to 248 * lose connectivity. So hold onto the LTB even if we fail to communicate 249 * with the VIOS and reuse it on next open. Free LTB when adapter is closed. 250 * 251 * Return: 0 if we were able to allocate the LTB and notify the VIOS and 252 * a negative value otherwise. 253 */ 254 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 255 struct ibmvnic_long_term_buff *ltb, int size) 256 { 257 struct device *dev = &adapter->vdev->dev; 258 int rc; 259 260 if (!reuse_ltb(ltb, size)) { 261 dev_dbg(dev, 262 "LTB size changed from 0x%llx to 0x%x, reallocating\n", 263 ltb->size, size); 264 free_long_term_buff(adapter, ltb); 265 } 266 267 if (ltb->buff) { 268 dev_dbg(dev, "Reusing LTB [map %d, size 0x%llx]\n", 269 ltb->map_id, ltb->size); 270 } else { 271 ltb->buff = dma_alloc_coherent(dev, size, <b->addr, 272 GFP_KERNEL); 273 if (!ltb->buff) { 274 dev_err(dev, "Couldn't alloc long term buffer\n"); 275 return -ENOMEM; 276 } 277 ltb->size = size; 278 279 ltb->map_id = find_first_zero_bit(adapter->map_ids, 280 MAX_MAP_ID); 281 bitmap_set(adapter->map_ids, ltb->map_id, 1); 282 283 dev_dbg(dev, 284 "Allocated new LTB [map %d, size 0x%llx]\n", 285 ltb->map_id, ltb->size); 286 } 287 288 /* Ensure ltb is zeroed - specially when reusing it. */ 289 memset(ltb->buff, 0, ltb->size); 290 291 mutex_lock(&adapter->fw_lock); 292 adapter->fw_done_rc = 0; 293 reinit_completion(&adapter->fw_done); 294 295 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 296 if (rc) { 297 dev_err(dev, "send_request_map failed, rc = %d\n", rc); 298 goto out; 299 } 300 301 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 302 if (rc) { 303 dev_err(dev, "LTB map request aborted or timed out, rc = %d\n", 304 rc); 305 goto out; 306 } 307 308 if (adapter->fw_done_rc) { 309 dev_err(dev, "Couldn't map LTB, rc = %d\n", 310 adapter->fw_done_rc); 311 rc = -EIO; 312 goto out; 313 } 314 rc = 0; 315 out: 316 /* don't free LTB on communication error - see function header */ 317 mutex_unlock(&adapter->fw_lock); 318 return rc; 319 } 320 321 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 322 struct ibmvnic_long_term_buff *ltb) 323 { 324 struct device *dev = &adapter->vdev->dev; 325 326 if (!ltb->buff) 327 return; 328 329 /* VIOS automatically unmaps the long term buffer at remote 330 * end for the following resets: 331 * FAILOVER, MOBILITY, TIMEOUT. 332 */ 333 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 334 adapter->reset_reason != VNIC_RESET_MOBILITY && 335 adapter->reset_reason != VNIC_RESET_TIMEOUT) 336 send_request_unmap(adapter, ltb->map_id); 337 338 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 339 340 ltb->buff = NULL; 341 /* mark this map_id free */ 342 bitmap_clear(adapter->map_ids, ltb->map_id, 1); 343 ltb->map_id = 0; 344 } 345 346 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 347 { 348 int i; 349 350 for (i = 0; i < adapter->num_active_rx_pools; i++) 351 adapter->rx_pool[i].active = 0; 352 } 353 354 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 355 struct ibmvnic_rx_pool *pool) 356 { 357 int count = pool->size - atomic_read(&pool->available); 358 u64 handle = adapter->rx_scrq[pool->index]->handle; 359 struct device *dev = &adapter->vdev->dev; 360 struct ibmvnic_ind_xmit_queue *ind_bufp; 361 struct ibmvnic_sub_crq_queue *rx_scrq; 362 union sub_crq *sub_crq; 363 int buffers_added = 0; 364 unsigned long lpar_rc; 365 struct sk_buff *skb; 366 unsigned int offset; 367 dma_addr_t dma_addr; 368 unsigned char *dst; 369 int shift = 0; 370 int index; 371 int i; 372 373 if (!pool->active) 374 return; 375 376 rx_scrq = adapter->rx_scrq[pool->index]; 377 ind_bufp = &rx_scrq->ind_buf; 378 379 /* netdev_skb_alloc() could have failed after we saved a few skbs 380 * in the indir_buf and we would not have sent them to VIOS yet. 381 * To account for them, start the loop at ind_bufp->index rather 382 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will 383 * be 0. 384 */ 385 for (i = ind_bufp->index; i < count; ++i) { 386 index = pool->free_map[pool->next_free]; 387 388 /* We maybe reusing the skb from earlier resets. Allocate 389 * only if necessary. But since the LTB may have changed 390 * during reset (see init_rx_pools()), update LTB below 391 * even if reusing skb. 392 */ 393 skb = pool->rx_buff[index].skb; 394 if (!skb) { 395 skb = netdev_alloc_skb(adapter->netdev, 396 pool->buff_size); 397 if (!skb) { 398 dev_err(dev, "Couldn't replenish rx buff\n"); 399 adapter->replenish_no_mem++; 400 break; 401 } 402 } 403 404 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 405 pool->next_free = (pool->next_free + 1) % pool->size; 406 407 /* Copy the skb to the long term mapped DMA buffer */ 408 offset = index * pool->buff_size; 409 dst = pool->long_term_buff.buff + offset; 410 memset(dst, 0, pool->buff_size); 411 dma_addr = pool->long_term_buff.addr + offset; 412 413 /* add the skb to an rx_buff in the pool */ 414 pool->rx_buff[index].data = dst; 415 pool->rx_buff[index].dma = dma_addr; 416 pool->rx_buff[index].skb = skb; 417 pool->rx_buff[index].pool_index = pool->index; 418 pool->rx_buff[index].size = pool->buff_size; 419 420 /* queue the rx_buff for the next send_subcrq_indirect */ 421 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 422 memset(sub_crq, 0, sizeof(*sub_crq)); 423 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 424 sub_crq->rx_add.correlator = 425 cpu_to_be64((u64)&pool->rx_buff[index]); 426 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 427 sub_crq->rx_add.map_id = pool->long_term_buff.map_id; 428 429 /* The length field of the sCRQ is defined to be 24 bits so the 430 * buffer size needs to be left shifted by a byte before it is 431 * converted to big endian to prevent the last byte from being 432 * truncated. 433 */ 434 #ifdef __LITTLE_ENDIAN__ 435 shift = 8; 436 #endif 437 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 438 439 /* if send_subcrq_indirect queue is full, flush to VIOS */ 440 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 441 i == count - 1) { 442 lpar_rc = 443 send_subcrq_indirect(adapter, handle, 444 (u64)ind_bufp->indir_dma, 445 (u64)ind_bufp->index); 446 if (lpar_rc != H_SUCCESS) 447 goto failure; 448 buffers_added += ind_bufp->index; 449 adapter->replenish_add_buff_success += ind_bufp->index; 450 ind_bufp->index = 0; 451 } 452 } 453 atomic_add(buffers_added, &pool->available); 454 return; 455 456 failure: 457 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 458 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 459 for (i = ind_bufp->index - 1; i >= 0; --i) { 460 struct ibmvnic_rx_buff *rx_buff; 461 462 pool->next_free = pool->next_free == 0 ? 463 pool->size - 1 : pool->next_free - 1; 464 sub_crq = &ind_bufp->indir_arr[i]; 465 rx_buff = (struct ibmvnic_rx_buff *) 466 be64_to_cpu(sub_crq->rx_add.correlator); 467 index = (int)(rx_buff - pool->rx_buff); 468 pool->free_map[pool->next_free] = index; 469 dev_kfree_skb_any(pool->rx_buff[index].skb); 470 pool->rx_buff[index].skb = NULL; 471 } 472 adapter->replenish_add_buff_failure += ind_bufp->index; 473 atomic_add(buffers_added, &pool->available); 474 ind_bufp->index = 0; 475 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 476 /* Disable buffer pool replenishment and report carrier off if 477 * queue is closed or pending failover. 478 * Firmware guarantees that a signal will be sent to the 479 * driver, triggering a reset. 480 */ 481 deactivate_rx_pools(adapter); 482 netif_carrier_off(adapter->netdev); 483 } 484 } 485 486 static void replenish_pools(struct ibmvnic_adapter *adapter) 487 { 488 int i; 489 490 adapter->replenish_task_cycles++; 491 for (i = 0; i < adapter->num_active_rx_pools; i++) { 492 if (adapter->rx_pool[i].active) 493 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 494 } 495 496 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); 497 } 498 499 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 500 { 501 kfree(adapter->tx_stats_buffers); 502 kfree(adapter->rx_stats_buffers); 503 adapter->tx_stats_buffers = NULL; 504 adapter->rx_stats_buffers = NULL; 505 } 506 507 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 508 { 509 adapter->tx_stats_buffers = 510 kcalloc(IBMVNIC_MAX_QUEUES, 511 sizeof(struct ibmvnic_tx_queue_stats), 512 GFP_KERNEL); 513 if (!adapter->tx_stats_buffers) 514 return -ENOMEM; 515 516 adapter->rx_stats_buffers = 517 kcalloc(IBMVNIC_MAX_QUEUES, 518 sizeof(struct ibmvnic_rx_queue_stats), 519 GFP_KERNEL); 520 if (!adapter->rx_stats_buffers) 521 return -ENOMEM; 522 523 return 0; 524 } 525 526 static void release_stats_token(struct ibmvnic_adapter *adapter) 527 { 528 struct device *dev = &adapter->vdev->dev; 529 530 if (!adapter->stats_token) 531 return; 532 533 dma_unmap_single(dev, adapter->stats_token, 534 sizeof(struct ibmvnic_statistics), 535 DMA_FROM_DEVICE); 536 adapter->stats_token = 0; 537 } 538 539 static int init_stats_token(struct ibmvnic_adapter *adapter) 540 { 541 struct device *dev = &adapter->vdev->dev; 542 dma_addr_t stok; 543 int rc; 544 545 stok = dma_map_single(dev, &adapter->stats, 546 sizeof(struct ibmvnic_statistics), 547 DMA_FROM_DEVICE); 548 rc = dma_mapping_error(dev, stok); 549 if (rc) { 550 dev_err(dev, "Couldn't map stats buffer, rc = %d\n", rc); 551 return rc; 552 } 553 554 adapter->stats_token = stok; 555 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 556 return 0; 557 } 558 559 /** 560 * release_rx_pools() - Release any rx pools attached to @adapter. 561 * @adapter: ibmvnic adapter 562 * 563 * Safe to call this multiple times - even if no pools are attached. 564 */ 565 static void release_rx_pools(struct ibmvnic_adapter *adapter) 566 { 567 struct ibmvnic_rx_pool *rx_pool; 568 int i, j; 569 570 if (!adapter->rx_pool) 571 return; 572 573 for (i = 0; i < adapter->num_active_rx_pools; i++) { 574 rx_pool = &adapter->rx_pool[i]; 575 576 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 577 578 kfree(rx_pool->free_map); 579 580 free_long_term_buff(adapter, &rx_pool->long_term_buff); 581 582 if (!rx_pool->rx_buff) 583 continue; 584 585 for (j = 0; j < rx_pool->size; j++) { 586 if (rx_pool->rx_buff[j].skb) { 587 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 588 rx_pool->rx_buff[j].skb = NULL; 589 } 590 } 591 592 kfree(rx_pool->rx_buff); 593 } 594 595 kfree(adapter->rx_pool); 596 adapter->rx_pool = NULL; 597 adapter->num_active_rx_pools = 0; 598 adapter->prev_rx_pool_size = 0; 599 } 600 601 /** 602 * reuse_rx_pools() - Check if the existing rx pools can be reused. 603 * @adapter: ibmvnic adapter 604 * 605 * Check if the existing rx pools in the adapter can be reused. The 606 * pools can be reused if the pool parameters (number of pools, 607 * number of buffers in the pool and size of each buffer) have not 608 * changed. 609 * 610 * NOTE: This assumes that all pools have the same number of buffers 611 * which is the case currently. If that changes, we must fix this. 612 * 613 * Return: true if the rx pools can be reused, false otherwise. 614 */ 615 static bool reuse_rx_pools(struct ibmvnic_adapter *adapter) 616 { 617 u64 old_num_pools, new_num_pools; 618 u64 old_pool_size, new_pool_size; 619 u64 old_buff_size, new_buff_size; 620 621 if (!adapter->rx_pool) 622 return false; 623 624 old_num_pools = adapter->num_active_rx_pools; 625 new_num_pools = adapter->req_rx_queues; 626 627 old_pool_size = adapter->prev_rx_pool_size; 628 new_pool_size = adapter->req_rx_add_entries_per_subcrq; 629 630 old_buff_size = adapter->prev_rx_buf_sz; 631 new_buff_size = adapter->cur_rx_buf_sz; 632 633 if (old_buff_size != new_buff_size || 634 old_num_pools != new_num_pools || 635 old_pool_size != new_pool_size) 636 return false; 637 638 return true; 639 } 640 641 /** 642 * init_rx_pools(): Initialize the set of receiver pools in the adapter. 643 * @netdev: net device associated with the vnic interface 644 * 645 * Initialize the set of receiver pools in the ibmvnic adapter associated 646 * with the net_device @netdev. If possible, reuse the existing rx pools. 647 * Otherwise free any existing pools and allocate a new set of pools 648 * before initializing them. 649 * 650 * Return: 0 on success and negative value on error. 651 */ 652 static int init_rx_pools(struct net_device *netdev) 653 { 654 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 655 struct device *dev = &adapter->vdev->dev; 656 struct ibmvnic_rx_pool *rx_pool; 657 u64 num_pools; 658 u64 pool_size; /* # of buffers in one pool */ 659 u64 buff_size; 660 int i, j, rc; 661 662 pool_size = adapter->req_rx_add_entries_per_subcrq; 663 num_pools = adapter->req_rx_queues; 664 buff_size = adapter->cur_rx_buf_sz; 665 666 if (reuse_rx_pools(adapter)) { 667 dev_dbg(dev, "Reusing rx pools\n"); 668 goto update_ltb; 669 } 670 671 /* Allocate/populate the pools. */ 672 release_rx_pools(adapter); 673 674 adapter->rx_pool = kcalloc(num_pools, 675 sizeof(struct ibmvnic_rx_pool), 676 GFP_KERNEL); 677 if (!adapter->rx_pool) { 678 dev_err(dev, "Failed to allocate rx pools\n"); 679 return -ENOMEM; 680 } 681 682 /* Set num_active_rx_pools early. If we fail below after partial 683 * allocation, release_rx_pools() will know how many to look for. 684 */ 685 adapter->num_active_rx_pools = num_pools; 686 687 for (i = 0; i < num_pools; i++) { 688 rx_pool = &adapter->rx_pool[i]; 689 690 netdev_dbg(adapter->netdev, 691 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 692 i, pool_size, buff_size); 693 694 rx_pool->size = pool_size; 695 rx_pool->index = i; 696 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 697 698 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 699 GFP_KERNEL); 700 if (!rx_pool->free_map) { 701 dev_err(dev, "Couldn't alloc free_map %d\n", i); 702 rc = -ENOMEM; 703 goto out_release; 704 } 705 706 rx_pool->rx_buff = kcalloc(rx_pool->size, 707 sizeof(struct ibmvnic_rx_buff), 708 GFP_KERNEL); 709 if (!rx_pool->rx_buff) { 710 dev_err(dev, "Couldn't alloc rx buffers\n"); 711 rc = -ENOMEM; 712 goto out_release; 713 } 714 } 715 716 adapter->prev_rx_pool_size = pool_size; 717 adapter->prev_rx_buf_sz = adapter->cur_rx_buf_sz; 718 719 update_ltb: 720 for (i = 0; i < num_pools; i++) { 721 rx_pool = &adapter->rx_pool[i]; 722 dev_dbg(dev, "Updating LTB for rx pool %d [%d, %d]\n", 723 i, rx_pool->size, rx_pool->buff_size); 724 725 rc = alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 726 rx_pool->size * rx_pool->buff_size); 727 if (rc) 728 goto out; 729 730 for (j = 0; j < rx_pool->size; ++j) { 731 struct ibmvnic_rx_buff *rx_buff; 732 733 rx_pool->free_map[j] = j; 734 735 /* NOTE: Don't clear rx_buff->skb here - will leak 736 * memory! replenish_rx_pool() will reuse skbs or 737 * allocate as necessary. 738 */ 739 rx_buff = &rx_pool->rx_buff[j]; 740 rx_buff->dma = 0; 741 rx_buff->data = 0; 742 rx_buff->size = 0; 743 rx_buff->pool_index = 0; 744 } 745 746 /* Mark pool "empty" so replenish_rx_pools() will 747 * update the LTB info for each buffer 748 */ 749 atomic_set(&rx_pool->available, 0); 750 rx_pool->next_alloc = 0; 751 rx_pool->next_free = 0; 752 /* replenish_rx_pool() may have called deactivate_rx_pools() 753 * on failover. Ensure pool is active now. 754 */ 755 rx_pool->active = 1; 756 } 757 return 0; 758 out_release: 759 release_rx_pools(adapter); 760 out: 761 /* We failed to allocate one or more LTBs or map them on the VIOS. 762 * Hold onto the pools and any LTBs that we did allocate/map. 763 */ 764 return rc; 765 } 766 767 static void release_vpd_data(struct ibmvnic_adapter *adapter) 768 { 769 if (!adapter->vpd) 770 return; 771 772 kfree(adapter->vpd->buff); 773 kfree(adapter->vpd); 774 775 adapter->vpd = NULL; 776 } 777 778 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 779 struct ibmvnic_tx_pool *tx_pool) 780 { 781 kfree(tx_pool->tx_buff); 782 kfree(tx_pool->free_map); 783 free_long_term_buff(adapter, &tx_pool->long_term_buff); 784 } 785 786 /** 787 * release_tx_pools() - Release any tx pools attached to @adapter. 788 * @adapter: ibmvnic adapter 789 * 790 * Safe to call this multiple times - even if no pools are attached. 791 */ 792 static void release_tx_pools(struct ibmvnic_adapter *adapter) 793 { 794 int i; 795 796 /* init_tx_pools() ensures that ->tx_pool and ->tso_pool are 797 * both NULL or both non-NULL. So we only need to check one. 798 */ 799 if (!adapter->tx_pool) 800 return; 801 802 for (i = 0; i < adapter->num_active_tx_pools; i++) { 803 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 804 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 805 } 806 807 kfree(adapter->tx_pool); 808 adapter->tx_pool = NULL; 809 kfree(adapter->tso_pool); 810 adapter->tso_pool = NULL; 811 adapter->num_active_tx_pools = 0; 812 adapter->prev_tx_pool_size = 0; 813 } 814 815 static int init_one_tx_pool(struct net_device *netdev, 816 struct ibmvnic_tx_pool *tx_pool, 817 int pool_size, int buf_size) 818 { 819 int i; 820 821 tx_pool->tx_buff = kcalloc(pool_size, 822 sizeof(struct ibmvnic_tx_buff), 823 GFP_KERNEL); 824 if (!tx_pool->tx_buff) 825 return -ENOMEM; 826 827 tx_pool->free_map = kcalloc(pool_size, sizeof(int), GFP_KERNEL); 828 if (!tx_pool->free_map) { 829 kfree(tx_pool->tx_buff); 830 tx_pool->tx_buff = NULL; 831 return -ENOMEM; 832 } 833 834 for (i = 0; i < pool_size; i++) 835 tx_pool->free_map[i] = i; 836 837 tx_pool->consumer_index = 0; 838 tx_pool->producer_index = 0; 839 tx_pool->num_buffers = pool_size; 840 tx_pool->buf_size = buf_size; 841 842 return 0; 843 } 844 845 /** 846 * reuse_tx_pools() - Check if the existing tx pools can be reused. 847 * @adapter: ibmvnic adapter 848 * 849 * Check if the existing tx pools in the adapter can be reused. The 850 * pools can be reused if the pool parameters (number of pools, 851 * number of buffers in the pool and mtu) have not changed. 852 * 853 * NOTE: This assumes that all pools have the same number of buffers 854 * which is the case currently. If that changes, we must fix this. 855 * 856 * Return: true if the tx pools can be reused, false otherwise. 857 */ 858 static bool reuse_tx_pools(struct ibmvnic_adapter *adapter) 859 { 860 u64 old_num_pools, new_num_pools; 861 u64 old_pool_size, new_pool_size; 862 u64 old_mtu, new_mtu; 863 864 if (!adapter->tx_pool) 865 return false; 866 867 old_num_pools = adapter->num_active_tx_pools; 868 new_num_pools = adapter->num_active_tx_scrqs; 869 old_pool_size = adapter->prev_tx_pool_size; 870 new_pool_size = adapter->req_tx_entries_per_subcrq; 871 old_mtu = adapter->prev_mtu; 872 new_mtu = adapter->req_mtu; 873 874 if (old_mtu != new_mtu || 875 old_num_pools != new_num_pools || 876 old_pool_size != new_pool_size) 877 return false; 878 879 return true; 880 } 881 882 /** 883 * init_tx_pools(): Initialize the set of transmit pools in the adapter. 884 * @netdev: net device associated with the vnic interface 885 * 886 * Initialize the set of transmit pools in the ibmvnic adapter associated 887 * with the net_device @netdev. If possible, reuse the existing tx pools. 888 * Otherwise free any existing pools and allocate a new set of pools 889 * before initializing them. 890 * 891 * Return: 0 on success and negative value on error. 892 */ 893 static int init_tx_pools(struct net_device *netdev) 894 { 895 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 896 struct device *dev = &adapter->vdev->dev; 897 int num_pools; 898 u64 pool_size; /* # of buffers in pool */ 899 u64 buff_size; 900 int i, j, rc; 901 902 num_pools = adapter->req_tx_queues; 903 904 /* We must notify the VIOS about the LTB on all resets - but we only 905 * need to alloc/populate pools if either the number of buffers or 906 * size of each buffer in the pool has changed. 907 */ 908 if (reuse_tx_pools(adapter)) { 909 netdev_dbg(netdev, "Reusing tx pools\n"); 910 goto update_ltb; 911 } 912 913 /* Allocate/populate the pools. */ 914 release_tx_pools(adapter); 915 916 pool_size = adapter->req_tx_entries_per_subcrq; 917 num_pools = adapter->num_active_tx_scrqs; 918 919 adapter->tx_pool = kcalloc(num_pools, 920 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 921 if (!adapter->tx_pool) 922 return -ENOMEM; 923 924 adapter->tso_pool = kcalloc(num_pools, 925 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 926 /* To simplify release_tx_pools() ensure that ->tx_pool and 927 * ->tso_pool are either both NULL or both non-NULL. 928 */ 929 if (!adapter->tso_pool) { 930 kfree(adapter->tx_pool); 931 adapter->tx_pool = NULL; 932 return -ENOMEM; 933 } 934 935 /* Set num_active_tx_pools early. If we fail below after partial 936 * allocation, release_tx_pools() will know how many to look for. 937 */ 938 adapter->num_active_tx_pools = num_pools; 939 940 buff_size = adapter->req_mtu + VLAN_HLEN; 941 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 942 943 for (i = 0; i < num_pools; i++) { 944 dev_dbg(dev, "Init tx pool %d [%llu, %llu]\n", 945 i, adapter->req_tx_entries_per_subcrq, buff_size); 946 947 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 948 pool_size, buff_size); 949 if (rc) 950 goto out_release; 951 952 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 953 IBMVNIC_TSO_BUFS, 954 IBMVNIC_TSO_BUF_SZ); 955 if (rc) 956 goto out_release; 957 } 958 959 adapter->prev_tx_pool_size = pool_size; 960 adapter->prev_mtu = adapter->req_mtu; 961 962 update_ltb: 963 /* NOTE: All tx_pools have the same number of buffers (which is 964 * same as pool_size). All tso_pools have IBMVNIC_TSO_BUFS 965 * buffers (see calls init_one_tx_pool() for these). 966 * For consistency, we use tx_pool->num_buffers and 967 * tso_pool->num_buffers below. 968 */ 969 rc = -1; 970 for (i = 0; i < num_pools; i++) { 971 struct ibmvnic_tx_pool *tso_pool; 972 struct ibmvnic_tx_pool *tx_pool; 973 u32 ltb_size; 974 975 tx_pool = &adapter->tx_pool[i]; 976 ltb_size = tx_pool->num_buffers * tx_pool->buf_size; 977 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 978 ltb_size)) 979 goto out; 980 981 dev_dbg(dev, "Updated LTB for tx pool %d [%p, %d, %d]\n", 982 i, tx_pool->long_term_buff.buff, 983 tx_pool->num_buffers, tx_pool->buf_size); 984 985 tx_pool->consumer_index = 0; 986 tx_pool->producer_index = 0; 987 988 for (j = 0; j < tx_pool->num_buffers; j++) 989 tx_pool->free_map[j] = j; 990 991 tso_pool = &adapter->tso_pool[i]; 992 ltb_size = tso_pool->num_buffers * tso_pool->buf_size; 993 if (alloc_long_term_buff(adapter, &tso_pool->long_term_buff, 994 ltb_size)) 995 goto out; 996 997 dev_dbg(dev, "Updated LTB for tso pool %d [%p, %d, %d]\n", 998 i, tso_pool->long_term_buff.buff, 999 tso_pool->num_buffers, tso_pool->buf_size); 1000 1001 tso_pool->consumer_index = 0; 1002 tso_pool->producer_index = 0; 1003 1004 for (j = 0; j < tso_pool->num_buffers; j++) 1005 tso_pool->free_map[j] = j; 1006 } 1007 1008 return 0; 1009 out_release: 1010 release_tx_pools(adapter); 1011 out: 1012 /* We failed to allocate one or more LTBs or map them on the VIOS. 1013 * Hold onto the pools and any LTBs that we did allocate/map. 1014 */ 1015 return rc; 1016 } 1017 1018 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 1019 { 1020 int i; 1021 1022 if (adapter->napi_enabled) 1023 return; 1024 1025 for (i = 0; i < adapter->req_rx_queues; i++) 1026 napi_enable(&adapter->napi[i]); 1027 1028 adapter->napi_enabled = true; 1029 } 1030 1031 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 1032 { 1033 int i; 1034 1035 if (!adapter->napi_enabled) 1036 return; 1037 1038 for (i = 0; i < adapter->req_rx_queues; i++) { 1039 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 1040 napi_disable(&adapter->napi[i]); 1041 } 1042 1043 adapter->napi_enabled = false; 1044 } 1045 1046 static int init_napi(struct ibmvnic_adapter *adapter) 1047 { 1048 int i; 1049 1050 adapter->napi = kcalloc(adapter->req_rx_queues, 1051 sizeof(struct napi_struct), GFP_KERNEL); 1052 if (!adapter->napi) 1053 return -ENOMEM; 1054 1055 for (i = 0; i < adapter->req_rx_queues; i++) { 1056 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 1057 netif_napi_add(adapter->netdev, &adapter->napi[i], 1058 ibmvnic_poll, NAPI_POLL_WEIGHT); 1059 } 1060 1061 adapter->num_active_rx_napi = adapter->req_rx_queues; 1062 return 0; 1063 } 1064 1065 static void release_napi(struct ibmvnic_adapter *adapter) 1066 { 1067 int i; 1068 1069 if (!adapter->napi) 1070 return; 1071 1072 for (i = 0; i < adapter->num_active_rx_napi; i++) { 1073 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 1074 netif_napi_del(&adapter->napi[i]); 1075 } 1076 1077 kfree(adapter->napi); 1078 adapter->napi = NULL; 1079 adapter->num_active_rx_napi = 0; 1080 adapter->napi_enabled = false; 1081 } 1082 1083 static const char *adapter_state_to_string(enum vnic_state state) 1084 { 1085 switch (state) { 1086 case VNIC_PROBING: 1087 return "PROBING"; 1088 case VNIC_PROBED: 1089 return "PROBED"; 1090 case VNIC_OPENING: 1091 return "OPENING"; 1092 case VNIC_OPEN: 1093 return "OPEN"; 1094 case VNIC_CLOSING: 1095 return "CLOSING"; 1096 case VNIC_CLOSED: 1097 return "CLOSED"; 1098 case VNIC_REMOVING: 1099 return "REMOVING"; 1100 case VNIC_REMOVED: 1101 return "REMOVED"; 1102 case VNIC_DOWN: 1103 return "DOWN"; 1104 } 1105 return "UNKNOWN"; 1106 } 1107 1108 static int ibmvnic_login(struct net_device *netdev) 1109 { 1110 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1111 unsigned long timeout = msecs_to_jiffies(20000); 1112 int retry_count = 0; 1113 int retries = 10; 1114 bool retry; 1115 int rc; 1116 1117 do { 1118 retry = false; 1119 if (retry_count > retries) { 1120 netdev_warn(netdev, "Login attempts exceeded\n"); 1121 return -EACCES; 1122 } 1123 1124 adapter->init_done_rc = 0; 1125 reinit_completion(&adapter->init_done); 1126 rc = send_login(adapter); 1127 if (rc) 1128 return rc; 1129 1130 if (!wait_for_completion_timeout(&adapter->init_done, 1131 timeout)) { 1132 netdev_warn(netdev, "Login timed out, retrying...\n"); 1133 retry = true; 1134 adapter->init_done_rc = 0; 1135 retry_count++; 1136 continue; 1137 } 1138 1139 if (adapter->init_done_rc == ABORTED) { 1140 netdev_warn(netdev, "Login aborted, retrying...\n"); 1141 retry = true; 1142 adapter->init_done_rc = 0; 1143 retry_count++; 1144 /* FW or device may be busy, so 1145 * wait a bit before retrying login 1146 */ 1147 msleep(500); 1148 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 1149 retry_count++; 1150 release_sub_crqs(adapter, 1); 1151 1152 retry = true; 1153 netdev_dbg(netdev, 1154 "Received partial success, retrying...\n"); 1155 adapter->init_done_rc = 0; 1156 reinit_completion(&adapter->init_done); 1157 send_query_cap(adapter); 1158 if (!wait_for_completion_timeout(&adapter->init_done, 1159 timeout)) { 1160 netdev_warn(netdev, 1161 "Capabilities query timed out\n"); 1162 return -ETIMEDOUT; 1163 } 1164 1165 rc = init_sub_crqs(adapter); 1166 if (rc) { 1167 netdev_warn(netdev, 1168 "SCRQ initialization failed\n"); 1169 return rc; 1170 } 1171 1172 rc = init_sub_crq_irqs(adapter); 1173 if (rc) { 1174 netdev_warn(netdev, 1175 "SCRQ irq initialization failed\n"); 1176 return rc; 1177 } 1178 } else if (adapter->init_done_rc) { 1179 netdev_warn(netdev, "Adapter login failed, init_done_rc = %d\n", 1180 adapter->init_done_rc); 1181 return -EIO; 1182 } 1183 } while (retry); 1184 1185 __ibmvnic_set_mac(netdev, adapter->mac_addr); 1186 1187 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state)); 1188 return 0; 1189 } 1190 1191 static void release_login_buffer(struct ibmvnic_adapter *adapter) 1192 { 1193 kfree(adapter->login_buf); 1194 adapter->login_buf = NULL; 1195 } 1196 1197 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 1198 { 1199 kfree(adapter->login_rsp_buf); 1200 adapter->login_rsp_buf = NULL; 1201 } 1202 1203 static void release_resources(struct ibmvnic_adapter *adapter) 1204 { 1205 release_vpd_data(adapter); 1206 1207 release_napi(adapter); 1208 release_login_buffer(adapter); 1209 release_login_rsp_buffer(adapter); 1210 } 1211 1212 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 1213 { 1214 struct net_device *netdev = adapter->netdev; 1215 unsigned long timeout = msecs_to_jiffies(20000); 1216 union ibmvnic_crq crq; 1217 bool resend; 1218 int rc; 1219 1220 netdev_dbg(netdev, "setting link state %d\n", link_state); 1221 1222 memset(&crq, 0, sizeof(crq)); 1223 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 1224 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 1225 crq.logical_link_state.link_state = link_state; 1226 1227 do { 1228 resend = false; 1229 1230 reinit_completion(&adapter->init_done); 1231 rc = ibmvnic_send_crq(adapter, &crq); 1232 if (rc) { 1233 netdev_err(netdev, "Failed to set link state\n"); 1234 return rc; 1235 } 1236 1237 if (!wait_for_completion_timeout(&adapter->init_done, 1238 timeout)) { 1239 netdev_err(netdev, "timeout setting link state\n"); 1240 return -ETIMEDOUT; 1241 } 1242 1243 if (adapter->init_done_rc == PARTIALSUCCESS) { 1244 /* Partuial success, delay and re-send */ 1245 mdelay(1000); 1246 resend = true; 1247 } else if (adapter->init_done_rc) { 1248 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 1249 adapter->init_done_rc); 1250 return adapter->init_done_rc; 1251 } 1252 } while (resend); 1253 1254 return 0; 1255 } 1256 1257 static int set_real_num_queues(struct net_device *netdev) 1258 { 1259 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1260 int rc; 1261 1262 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1263 adapter->req_tx_queues, adapter->req_rx_queues); 1264 1265 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1266 if (rc) { 1267 netdev_err(netdev, "failed to set the number of tx queues\n"); 1268 return rc; 1269 } 1270 1271 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1272 if (rc) 1273 netdev_err(netdev, "failed to set the number of rx queues\n"); 1274 1275 return rc; 1276 } 1277 1278 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1279 { 1280 struct device *dev = &adapter->vdev->dev; 1281 union ibmvnic_crq crq; 1282 int len = 0; 1283 int rc; 1284 1285 if (adapter->vpd->buff) 1286 len = adapter->vpd->len; 1287 1288 mutex_lock(&adapter->fw_lock); 1289 adapter->fw_done_rc = 0; 1290 reinit_completion(&adapter->fw_done); 1291 1292 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1293 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1294 rc = ibmvnic_send_crq(adapter, &crq); 1295 if (rc) { 1296 mutex_unlock(&adapter->fw_lock); 1297 return rc; 1298 } 1299 1300 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1301 if (rc) { 1302 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1303 mutex_unlock(&adapter->fw_lock); 1304 return rc; 1305 } 1306 mutex_unlock(&adapter->fw_lock); 1307 1308 if (!adapter->vpd->len) 1309 return -ENODATA; 1310 1311 if (!adapter->vpd->buff) 1312 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1313 else if (adapter->vpd->len != len) 1314 adapter->vpd->buff = 1315 krealloc(adapter->vpd->buff, 1316 adapter->vpd->len, GFP_KERNEL); 1317 1318 if (!adapter->vpd->buff) { 1319 dev_err(dev, "Could allocate VPD buffer\n"); 1320 return -ENOMEM; 1321 } 1322 1323 adapter->vpd->dma_addr = 1324 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1325 DMA_FROM_DEVICE); 1326 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1327 dev_err(dev, "Could not map VPD buffer\n"); 1328 kfree(adapter->vpd->buff); 1329 adapter->vpd->buff = NULL; 1330 return -ENOMEM; 1331 } 1332 1333 mutex_lock(&adapter->fw_lock); 1334 adapter->fw_done_rc = 0; 1335 reinit_completion(&adapter->fw_done); 1336 1337 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1338 crq.get_vpd.cmd = GET_VPD; 1339 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1340 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1341 rc = ibmvnic_send_crq(adapter, &crq); 1342 if (rc) { 1343 kfree(adapter->vpd->buff); 1344 adapter->vpd->buff = NULL; 1345 mutex_unlock(&adapter->fw_lock); 1346 return rc; 1347 } 1348 1349 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1350 if (rc) { 1351 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1352 kfree(adapter->vpd->buff); 1353 adapter->vpd->buff = NULL; 1354 mutex_unlock(&adapter->fw_lock); 1355 return rc; 1356 } 1357 1358 mutex_unlock(&adapter->fw_lock); 1359 return 0; 1360 } 1361 1362 static int init_resources(struct ibmvnic_adapter *adapter) 1363 { 1364 struct net_device *netdev = adapter->netdev; 1365 int rc; 1366 1367 rc = set_real_num_queues(netdev); 1368 if (rc) 1369 return rc; 1370 1371 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1372 if (!adapter->vpd) 1373 return -ENOMEM; 1374 1375 /* Vital Product Data (VPD) */ 1376 rc = ibmvnic_get_vpd(adapter); 1377 if (rc) { 1378 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1379 return rc; 1380 } 1381 1382 rc = init_napi(adapter); 1383 if (rc) 1384 return rc; 1385 1386 send_query_map(adapter); 1387 1388 rc = init_rx_pools(netdev); 1389 if (rc) 1390 return rc; 1391 1392 rc = init_tx_pools(netdev); 1393 return rc; 1394 } 1395 1396 static int __ibmvnic_open(struct net_device *netdev) 1397 { 1398 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1399 enum vnic_state prev_state = adapter->state; 1400 int i, rc; 1401 1402 adapter->state = VNIC_OPENING; 1403 replenish_pools(adapter); 1404 ibmvnic_napi_enable(adapter); 1405 1406 /* We're ready to receive frames, enable the sub-crq interrupts and 1407 * set the logical link state to up 1408 */ 1409 for (i = 0; i < adapter->req_rx_queues; i++) { 1410 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1411 if (prev_state == VNIC_CLOSED) 1412 enable_irq(adapter->rx_scrq[i]->irq); 1413 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1414 } 1415 1416 for (i = 0; i < adapter->req_tx_queues; i++) { 1417 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1418 if (prev_state == VNIC_CLOSED) 1419 enable_irq(adapter->tx_scrq[i]->irq); 1420 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1421 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1422 } 1423 1424 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1425 if (rc) { 1426 ibmvnic_napi_disable(adapter); 1427 release_resources(adapter); 1428 return rc; 1429 } 1430 1431 netif_tx_start_all_queues(netdev); 1432 1433 if (prev_state == VNIC_CLOSED) { 1434 for (i = 0; i < adapter->req_rx_queues; i++) 1435 napi_schedule(&adapter->napi[i]); 1436 } 1437 1438 adapter->state = VNIC_OPEN; 1439 return rc; 1440 } 1441 1442 static int ibmvnic_open(struct net_device *netdev) 1443 { 1444 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1445 int rc; 1446 1447 ASSERT_RTNL(); 1448 1449 /* If device failover is pending or we are about to reset, just set 1450 * device state and return. Device operation will be handled by reset 1451 * routine. 1452 * 1453 * It should be safe to overwrite the adapter->state here. Since 1454 * we hold the rtnl, either the reset has not actually started or 1455 * the rtnl got dropped during the set_link_state() in do_reset(). 1456 * In the former case, no one else is changing the state (again we 1457 * have the rtnl) and in the latter case, do_reset() will detect and 1458 * honor our setting below. 1459 */ 1460 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { 1461 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n", 1462 adapter_state_to_string(adapter->state), 1463 adapter->failover_pending); 1464 adapter->state = VNIC_OPEN; 1465 rc = 0; 1466 goto out; 1467 } 1468 1469 if (adapter->state != VNIC_CLOSED) { 1470 rc = ibmvnic_login(netdev); 1471 if (rc) 1472 goto out; 1473 1474 rc = init_resources(adapter); 1475 if (rc) { 1476 netdev_err(netdev, "failed to initialize resources\n"); 1477 release_resources(adapter); 1478 release_rx_pools(adapter); 1479 release_tx_pools(adapter); 1480 goto out; 1481 } 1482 } 1483 1484 rc = __ibmvnic_open(netdev); 1485 1486 out: 1487 /* If open failed and there is a pending failover or in-progress reset, 1488 * set device state and return. Device operation will be handled by 1489 * reset routine. See also comments above regarding rtnl. 1490 */ 1491 if (rc && 1492 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { 1493 adapter->state = VNIC_OPEN; 1494 rc = 0; 1495 } 1496 return rc; 1497 } 1498 1499 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1500 { 1501 struct ibmvnic_rx_pool *rx_pool; 1502 struct ibmvnic_rx_buff *rx_buff; 1503 u64 rx_entries; 1504 int rx_scrqs; 1505 int i, j; 1506 1507 if (!adapter->rx_pool) 1508 return; 1509 1510 rx_scrqs = adapter->num_active_rx_pools; 1511 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1512 1513 /* Free any remaining skbs in the rx buffer pools */ 1514 for (i = 0; i < rx_scrqs; i++) { 1515 rx_pool = &adapter->rx_pool[i]; 1516 if (!rx_pool || !rx_pool->rx_buff) 1517 continue; 1518 1519 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1520 for (j = 0; j < rx_entries; j++) { 1521 rx_buff = &rx_pool->rx_buff[j]; 1522 if (rx_buff && rx_buff->skb) { 1523 dev_kfree_skb_any(rx_buff->skb); 1524 rx_buff->skb = NULL; 1525 } 1526 } 1527 } 1528 } 1529 1530 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1531 struct ibmvnic_tx_pool *tx_pool) 1532 { 1533 struct ibmvnic_tx_buff *tx_buff; 1534 u64 tx_entries; 1535 int i; 1536 1537 if (!tx_pool || !tx_pool->tx_buff) 1538 return; 1539 1540 tx_entries = tx_pool->num_buffers; 1541 1542 for (i = 0; i < tx_entries; i++) { 1543 tx_buff = &tx_pool->tx_buff[i]; 1544 if (tx_buff && tx_buff->skb) { 1545 dev_kfree_skb_any(tx_buff->skb); 1546 tx_buff->skb = NULL; 1547 } 1548 } 1549 } 1550 1551 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1552 { 1553 int tx_scrqs; 1554 int i; 1555 1556 if (!adapter->tx_pool || !adapter->tso_pool) 1557 return; 1558 1559 tx_scrqs = adapter->num_active_tx_pools; 1560 1561 /* Free any remaining skbs in the tx buffer pools */ 1562 for (i = 0; i < tx_scrqs; i++) { 1563 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1564 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1565 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1566 } 1567 } 1568 1569 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1570 { 1571 struct net_device *netdev = adapter->netdev; 1572 int i; 1573 1574 if (adapter->tx_scrq) { 1575 for (i = 0; i < adapter->req_tx_queues; i++) 1576 if (adapter->tx_scrq[i]->irq) { 1577 netdev_dbg(netdev, 1578 "Disabling tx_scrq[%d] irq\n", i); 1579 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1580 disable_irq(adapter->tx_scrq[i]->irq); 1581 } 1582 } 1583 1584 if (adapter->rx_scrq) { 1585 for (i = 0; i < adapter->req_rx_queues; i++) { 1586 if (adapter->rx_scrq[i]->irq) { 1587 netdev_dbg(netdev, 1588 "Disabling rx_scrq[%d] irq\n", i); 1589 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1590 disable_irq(adapter->rx_scrq[i]->irq); 1591 } 1592 } 1593 } 1594 } 1595 1596 static void ibmvnic_cleanup(struct net_device *netdev) 1597 { 1598 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1599 1600 /* ensure that transmissions are stopped if called by do_reset */ 1601 if (test_bit(0, &adapter->resetting)) 1602 netif_tx_disable(netdev); 1603 else 1604 netif_tx_stop_all_queues(netdev); 1605 1606 ibmvnic_napi_disable(adapter); 1607 ibmvnic_disable_irqs(adapter); 1608 } 1609 1610 static int __ibmvnic_close(struct net_device *netdev) 1611 { 1612 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1613 int rc = 0; 1614 1615 adapter->state = VNIC_CLOSING; 1616 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1617 adapter->state = VNIC_CLOSED; 1618 return rc; 1619 } 1620 1621 static int ibmvnic_close(struct net_device *netdev) 1622 { 1623 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1624 int rc; 1625 1626 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n", 1627 adapter_state_to_string(adapter->state), 1628 adapter->failover_pending, 1629 adapter->force_reset_recovery); 1630 1631 /* If device failover is pending, just set device state and return. 1632 * Device operation will be handled by reset routine. 1633 */ 1634 if (adapter->failover_pending) { 1635 adapter->state = VNIC_CLOSED; 1636 return 0; 1637 } 1638 1639 rc = __ibmvnic_close(netdev); 1640 ibmvnic_cleanup(netdev); 1641 clean_rx_pools(adapter); 1642 clean_tx_pools(adapter); 1643 1644 return rc; 1645 } 1646 1647 /** 1648 * build_hdr_data - creates L2/L3/L4 header data buffer 1649 * @hdr_field: bitfield determining needed headers 1650 * @skb: socket buffer 1651 * @hdr_len: array of header lengths 1652 * @hdr_data: buffer to write the header to 1653 * 1654 * Reads hdr_field to determine which headers are needed by firmware. 1655 * Builds a buffer containing these headers. Saves individual header 1656 * lengths and total buffer length to be used to build descriptors. 1657 */ 1658 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1659 int *hdr_len, u8 *hdr_data) 1660 { 1661 int len = 0; 1662 u8 *hdr; 1663 1664 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1665 hdr_len[0] = sizeof(struct vlan_ethhdr); 1666 else 1667 hdr_len[0] = sizeof(struct ethhdr); 1668 1669 if (skb->protocol == htons(ETH_P_IP)) { 1670 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1671 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1672 hdr_len[2] = tcp_hdrlen(skb); 1673 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1674 hdr_len[2] = sizeof(struct udphdr); 1675 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1676 hdr_len[1] = sizeof(struct ipv6hdr); 1677 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1678 hdr_len[2] = tcp_hdrlen(skb); 1679 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1680 hdr_len[2] = sizeof(struct udphdr); 1681 } else if (skb->protocol == htons(ETH_P_ARP)) { 1682 hdr_len[1] = arp_hdr_len(skb->dev); 1683 hdr_len[2] = 0; 1684 } 1685 1686 memset(hdr_data, 0, 120); 1687 if ((hdr_field >> 6) & 1) { 1688 hdr = skb_mac_header(skb); 1689 memcpy(hdr_data, hdr, hdr_len[0]); 1690 len += hdr_len[0]; 1691 } 1692 1693 if ((hdr_field >> 5) & 1) { 1694 hdr = skb_network_header(skb); 1695 memcpy(hdr_data + len, hdr, hdr_len[1]); 1696 len += hdr_len[1]; 1697 } 1698 1699 if ((hdr_field >> 4) & 1) { 1700 hdr = skb_transport_header(skb); 1701 memcpy(hdr_data + len, hdr, hdr_len[2]); 1702 len += hdr_len[2]; 1703 } 1704 return len; 1705 } 1706 1707 /** 1708 * create_hdr_descs - create header and header extension descriptors 1709 * @hdr_field: bitfield determining needed headers 1710 * @hdr_data: buffer containing header data 1711 * @len: length of data buffer 1712 * @hdr_len: array of individual header lengths 1713 * @scrq_arr: descriptor array 1714 * 1715 * Creates header and, if needed, header extension descriptors and 1716 * places them in a descriptor array, scrq_arr 1717 */ 1718 1719 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1720 union sub_crq *scrq_arr) 1721 { 1722 union sub_crq hdr_desc; 1723 int tmp_len = len; 1724 int num_descs = 0; 1725 u8 *data, *cur; 1726 int tmp; 1727 1728 while (tmp_len > 0) { 1729 cur = hdr_data + len - tmp_len; 1730 1731 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1732 if (cur != hdr_data) { 1733 data = hdr_desc.hdr_ext.data; 1734 tmp = tmp_len > 29 ? 29 : tmp_len; 1735 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1736 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1737 hdr_desc.hdr_ext.len = tmp; 1738 } else { 1739 data = hdr_desc.hdr.data; 1740 tmp = tmp_len > 24 ? 24 : tmp_len; 1741 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1742 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1743 hdr_desc.hdr.len = tmp; 1744 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1745 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1746 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1747 hdr_desc.hdr.flag = hdr_field << 1; 1748 } 1749 memcpy(data, cur, tmp); 1750 tmp_len -= tmp; 1751 *scrq_arr = hdr_desc; 1752 scrq_arr++; 1753 num_descs++; 1754 } 1755 1756 return num_descs; 1757 } 1758 1759 /** 1760 * build_hdr_descs_arr - build a header descriptor array 1761 * @skb: tx socket buffer 1762 * @indir_arr: indirect array 1763 * @num_entries: number of descriptors to be sent 1764 * @hdr_field: bit field determining which headers will be sent 1765 * 1766 * This function will build a TX descriptor array with applicable 1767 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1768 */ 1769 1770 static void build_hdr_descs_arr(struct sk_buff *skb, 1771 union sub_crq *indir_arr, 1772 int *num_entries, u8 hdr_field) 1773 { 1774 int hdr_len[3] = {0, 0, 0}; 1775 u8 hdr_data[140] = {0}; 1776 int tot_len; 1777 1778 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 1779 hdr_data); 1780 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1781 indir_arr + 1); 1782 } 1783 1784 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1785 struct net_device *netdev) 1786 { 1787 /* For some backing devices, mishandling of small packets 1788 * can result in a loss of connection or TX stall. Device 1789 * architects recommend that no packet should be smaller 1790 * than the minimum MTU value provided to the driver, so 1791 * pad any packets to that length 1792 */ 1793 if (skb->len < netdev->min_mtu) 1794 return skb_put_padto(skb, netdev->min_mtu); 1795 1796 return 0; 1797 } 1798 1799 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 1800 struct ibmvnic_sub_crq_queue *tx_scrq) 1801 { 1802 struct ibmvnic_ind_xmit_queue *ind_bufp; 1803 struct ibmvnic_tx_buff *tx_buff; 1804 struct ibmvnic_tx_pool *tx_pool; 1805 union sub_crq tx_scrq_entry; 1806 int queue_num; 1807 int entries; 1808 int index; 1809 int i; 1810 1811 ind_bufp = &tx_scrq->ind_buf; 1812 entries = (u64)ind_bufp->index; 1813 queue_num = tx_scrq->pool_index; 1814 1815 for (i = entries - 1; i >= 0; --i) { 1816 tx_scrq_entry = ind_bufp->indir_arr[i]; 1817 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 1818 continue; 1819 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 1820 if (index & IBMVNIC_TSO_POOL_MASK) { 1821 tx_pool = &adapter->tso_pool[queue_num]; 1822 index &= ~IBMVNIC_TSO_POOL_MASK; 1823 } else { 1824 tx_pool = &adapter->tx_pool[queue_num]; 1825 } 1826 tx_pool->free_map[tx_pool->consumer_index] = index; 1827 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1828 tx_pool->num_buffers - 1 : 1829 tx_pool->consumer_index - 1; 1830 tx_buff = &tx_pool->tx_buff[index]; 1831 adapter->netdev->stats.tx_packets--; 1832 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 1833 adapter->tx_stats_buffers[queue_num].packets--; 1834 adapter->tx_stats_buffers[queue_num].bytes -= 1835 tx_buff->skb->len; 1836 dev_kfree_skb_any(tx_buff->skb); 1837 tx_buff->skb = NULL; 1838 adapter->netdev->stats.tx_dropped++; 1839 } 1840 ind_bufp->index = 0; 1841 if (atomic_sub_return(entries, &tx_scrq->used) <= 1842 (adapter->req_tx_entries_per_subcrq / 2) && 1843 __netif_subqueue_stopped(adapter->netdev, queue_num) && 1844 !test_bit(0, &adapter->resetting)) { 1845 netif_wake_subqueue(adapter->netdev, queue_num); 1846 netdev_dbg(adapter->netdev, "Started queue %d\n", 1847 queue_num); 1848 } 1849 } 1850 1851 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 1852 struct ibmvnic_sub_crq_queue *tx_scrq) 1853 { 1854 struct ibmvnic_ind_xmit_queue *ind_bufp; 1855 u64 dma_addr; 1856 u64 entries; 1857 u64 handle; 1858 int rc; 1859 1860 ind_bufp = &tx_scrq->ind_buf; 1861 dma_addr = (u64)ind_bufp->indir_dma; 1862 entries = (u64)ind_bufp->index; 1863 handle = tx_scrq->handle; 1864 1865 if (!entries) 1866 return 0; 1867 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 1868 if (rc) 1869 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 1870 else 1871 ind_bufp->index = 0; 1872 return 0; 1873 } 1874 1875 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1876 { 1877 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1878 int queue_num = skb_get_queue_mapping(skb); 1879 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1880 struct device *dev = &adapter->vdev->dev; 1881 struct ibmvnic_ind_xmit_queue *ind_bufp; 1882 struct ibmvnic_tx_buff *tx_buff = NULL; 1883 struct ibmvnic_sub_crq_queue *tx_scrq; 1884 struct ibmvnic_tx_pool *tx_pool; 1885 unsigned int tx_send_failed = 0; 1886 netdev_tx_t ret = NETDEV_TX_OK; 1887 unsigned int tx_map_failed = 0; 1888 union sub_crq indir_arr[16]; 1889 unsigned int tx_dropped = 0; 1890 unsigned int tx_packets = 0; 1891 unsigned int tx_bytes = 0; 1892 dma_addr_t data_dma_addr; 1893 struct netdev_queue *txq; 1894 unsigned long lpar_rc; 1895 union sub_crq tx_crq; 1896 unsigned int offset; 1897 int num_entries = 1; 1898 unsigned char *dst; 1899 int index = 0; 1900 u8 proto = 0; 1901 1902 tx_scrq = adapter->tx_scrq[queue_num]; 1903 txq = netdev_get_tx_queue(netdev, queue_num); 1904 ind_bufp = &tx_scrq->ind_buf; 1905 1906 if (test_bit(0, &adapter->resetting)) { 1907 dev_kfree_skb_any(skb); 1908 1909 tx_send_failed++; 1910 tx_dropped++; 1911 ret = NETDEV_TX_OK; 1912 goto out; 1913 } 1914 1915 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1916 tx_dropped++; 1917 tx_send_failed++; 1918 ret = NETDEV_TX_OK; 1919 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1920 goto out; 1921 } 1922 if (skb_is_gso(skb)) 1923 tx_pool = &adapter->tso_pool[queue_num]; 1924 else 1925 tx_pool = &adapter->tx_pool[queue_num]; 1926 1927 index = tx_pool->free_map[tx_pool->consumer_index]; 1928 1929 if (index == IBMVNIC_INVALID_MAP) { 1930 dev_kfree_skb_any(skb); 1931 tx_send_failed++; 1932 tx_dropped++; 1933 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1934 ret = NETDEV_TX_OK; 1935 goto out; 1936 } 1937 1938 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1939 1940 offset = index * tx_pool->buf_size; 1941 dst = tx_pool->long_term_buff.buff + offset; 1942 memset(dst, 0, tx_pool->buf_size); 1943 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1944 1945 if (skb_shinfo(skb)->nr_frags) { 1946 int cur, i; 1947 1948 /* Copy the head */ 1949 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1950 cur = skb_headlen(skb); 1951 1952 /* Copy the frags */ 1953 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1954 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1955 1956 memcpy(dst + cur, skb_frag_address(frag), 1957 skb_frag_size(frag)); 1958 cur += skb_frag_size(frag); 1959 } 1960 } else { 1961 skb_copy_from_linear_data(skb, dst, skb->len); 1962 } 1963 1964 /* post changes to long_term_buff *dst before VIOS accessing it */ 1965 dma_wmb(); 1966 1967 tx_pool->consumer_index = 1968 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1969 1970 tx_buff = &tx_pool->tx_buff[index]; 1971 tx_buff->skb = skb; 1972 tx_buff->index = index; 1973 tx_buff->pool_index = queue_num; 1974 1975 memset(&tx_crq, 0, sizeof(tx_crq)); 1976 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1977 tx_crq.v1.type = IBMVNIC_TX_DESC; 1978 tx_crq.v1.n_crq_elem = 1; 1979 tx_crq.v1.n_sge = 1; 1980 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1981 1982 if (skb_is_gso(skb)) 1983 tx_crq.v1.correlator = 1984 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1985 else 1986 tx_crq.v1.correlator = cpu_to_be32(index); 1987 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1988 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1989 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1990 1991 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1992 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1993 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1994 } 1995 1996 if (skb->protocol == htons(ETH_P_IP)) { 1997 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1998 proto = ip_hdr(skb)->protocol; 1999 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2000 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 2001 proto = ipv6_hdr(skb)->nexthdr; 2002 } 2003 2004 if (proto == IPPROTO_TCP) 2005 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 2006 else if (proto == IPPROTO_UDP) 2007 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 2008 2009 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2010 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 2011 hdrs += 2; 2012 } 2013 if (skb_is_gso(skb)) { 2014 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 2015 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 2016 hdrs += 2; 2017 } 2018 2019 if ((*hdrs >> 7) & 1) 2020 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 2021 2022 tx_crq.v1.n_crq_elem = num_entries; 2023 tx_buff->num_entries = num_entries; 2024 /* flush buffer if current entry can not fit */ 2025 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 2026 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2027 if (lpar_rc != H_SUCCESS) 2028 goto tx_flush_err; 2029 } 2030 2031 indir_arr[0] = tx_crq; 2032 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 2033 num_entries * sizeof(struct ibmvnic_generic_scrq)); 2034 ind_bufp->index += num_entries; 2035 if (__netdev_tx_sent_queue(txq, skb->len, 2036 netdev_xmit_more() && 2037 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 2038 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 2039 if (lpar_rc != H_SUCCESS) 2040 goto tx_err; 2041 } 2042 2043 if (atomic_add_return(num_entries, &tx_scrq->used) 2044 >= adapter->req_tx_entries_per_subcrq) { 2045 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 2046 netif_stop_subqueue(netdev, queue_num); 2047 } 2048 2049 tx_packets++; 2050 tx_bytes += skb->len; 2051 txq_trans_cond_update(txq); 2052 ret = NETDEV_TX_OK; 2053 goto out; 2054 2055 tx_flush_err: 2056 dev_kfree_skb_any(skb); 2057 tx_buff->skb = NULL; 2058 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2059 tx_pool->num_buffers - 1 : 2060 tx_pool->consumer_index - 1; 2061 tx_dropped++; 2062 tx_err: 2063 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 2064 dev_err_ratelimited(dev, "tx: send failed\n"); 2065 2066 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 2067 /* Disable TX and report carrier off if queue is closed 2068 * or pending failover. 2069 * Firmware guarantees that a signal will be sent to the 2070 * driver, triggering a reset or some other action. 2071 */ 2072 netif_tx_stop_all_queues(netdev); 2073 netif_carrier_off(netdev); 2074 } 2075 out: 2076 netdev->stats.tx_dropped += tx_dropped; 2077 netdev->stats.tx_bytes += tx_bytes; 2078 netdev->stats.tx_packets += tx_packets; 2079 adapter->tx_send_failed += tx_send_failed; 2080 adapter->tx_map_failed += tx_map_failed; 2081 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 2082 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 2083 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 2084 2085 return ret; 2086 } 2087 2088 static void ibmvnic_set_multi(struct net_device *netdev) 2089 { 2090 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2091 struct netdev_hw_addr *ha; 2092 union ibmvnic_crq crq; 2093 2094 memset(&crq, 0, sizeof(crq)); 2095 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2096 crq.request_capability.cmd = REQUEST_CAPABILITY; 2097 2098 if (netdev->flags & IFF_PROMISC) { 2099 if (!adapter->promisc_supported) 2100 return; 2101 } else { 2102 if (netdev->flags & IFF_ALLMULTI) { 2103 /* Accept all multicast */ 2104 memset(&crq, 0, sizeof(crq)); 2105 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2106 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2107 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 2108 ibmvnic_send_crq(adapter, &crq); 2109 } else if (netdev_mc_empty(netdev)) { 2110 /* Reject all multicast */ 2111 memset(&crq, 0, sizeof(crq)); 2112 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2113 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2114 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 2115 ibmvnic_send_crq(adapter, &crq); 2116 } else { 2117 /* Accept one or more multicast(s) */ 2118 netdev_for_each_mc_addr(ha, netdev) { 2119 memset(&crq, 0, sizeof(crq)); 2120 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2121 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2122 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 2123 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 2124 ha->addr); 2125 ibmvnic_send_crq(adapter, &crq); 2126 } 2127 } 2128 } 2129 } 2130 2131 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 2132 { 2133 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2134 union ibmvnic_crq crq; 2135 int rc; 2136 2137 if (!is_valid_ether_addr(dev_addr)) { 2138 rc = -EADDRNOTAVAIL; 2139 goto err; 2140 } 2141 2142 memset(&crq, 0, sizeof(crq)); 2143 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 2144 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 2145 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 2146 2147 mutex_lock(&adapter->fw_lock); 2148 adapter->fw_done_rc = 0; 2149 reinit_completion(&adapter->fw_done); 2150 2151 rc = ibmvnic_send_crq(adapter, &crq); 2152 if (rc) { 2153 rc = -EIO; 2154 mutex_unlock(&adapter->fw_lock); 2155 goto err; 2156 } 2157 2158 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 2159 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 2160 if (rc || adapter->fw_done_rc) { 2161 rc = -EIO; 2162 mutex_unlock(&adapter->fw_lock); 2163 goto err; 2164 } 2165 mutex_unlock(&adapter->fw_lock); 2166 return 0; 2167 err: 2168 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 2169 return rc; 2170 } 2171 2172 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 2173 { 2174 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2175 struct sockaddr *addr = p; 2176 int rc; 2177 2178 rc = 0; 2179 if (!is_valid_ether_addr(addr->sa_data)) 2180 return -EADDRNOTAVAIL; 2181 2182 ether_addr_copy(adapter->mac_addr, addr->sa_data); 2183 if (adapter->state != VNIC_PROBED) 2184 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 2185 2186 return rc; 2187 } 2188 2189 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 2190 { 2191 switch (reason) { 2192 case VNIC_RESET_FAILOVER: 2193 return "FAILOVER"; 2194 case VNIC_RESET_MOBILITY: 2195 return "MOBILITY"; 2196 case VNIC_RESET_FATAL: 2197 return "FATAL"; 2198 case VNIC_RESET_NON_FATAL: 2199 return "NON_FATAL"; 2200 case VNIC_RESET_TIMEOUT: 2201 return "TIMEOUT"; 2202 case VNIC_RESET_CHANGE_PARAM: 2203 return "CHANGE_PARAM"; 2204 case VNIC_RESET_PASSIVE_INIT: 2205 return "PASSIVE_INIT"; 2206 } 2207 return "UNKNOWN"; 2208 } 2209 2210 /* 2211 * do_reset returns zero if we are able to keep processing reset events, or 2212 * non-zero if we hit a fatal error and must halt. 2213 */ 2214 static int do_reset(struct ibmvnic_adapter *adapter, 2215 struct ibmvnic_rwi *rwi, u32 reset_state) 2216 { 2217 struct net_device *netdev = adapter->netdev; 2218 u64 old_num_rx_queues, old_num_tx_queues; 2219 u64 old_num_rx_slots, old_num_tx_slots; 2220 int rc; 2221 2222 netdev_dbg(adapter->netdev, 2223 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 2224 adapter_state_to_string(adapter->state), 2225 adapter->failover_pending, 2226 reset_reason_to_string(rwi->reset_reason), 2227 adapter_state_to_string(reset_state)); 2228 2229 adapter->reset_reason = rwi->reset_reason; 2230 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 2231 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2232 rtnl_lock(); 2233 2234 /* Now that we have the rtnl lock, clear any pending failover. 2235 * This will ensure ibmvnic_open() has either completed or will 2236 * block until failover is complete. 2237 */ 2238 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2239 adapter->failover_pending = false; 2240 2241 /* read the state and check (again) after getting rtnl */ 2242 reset_state = adapter->state; 2243 2244 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2245 rc = -EBUSY; 2246 goto out; 2247 } 2248 2249 netif_carrier_off(netdev); 2250 2251 old_num_rx_queues = adapter->req_rx_queues; 2252 old_num_tx_queues = adapter->req_tx_queues; 2253 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2254 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2255 2256 ibmvnic_cleanup(netdev); 2257 2258 if (reset_state == VNIC_OPEN && 2259 adapter->reset_reason != VNIC_RESET_MOBILITY && 2260 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2261 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2262 rc = __ibmvnic_close(netdev); 2263 if (rc) 2264 goto out; 2265 } else { 2266 adapter->state = VNIC_CLOSING; 2267 2268 /* Release the RTNL lock before link state change and 2269 * re-acquire after the link state change to allow 2270 * linkwatch_event to grab the RTNL lock and run during 2271 * a reset. 2272 */ 2273 rtnl_unlock(); 2274 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2275 rtnl_lock(); 2276 if (rc) 2277 goto out; 2278 2279 if (adapter->state == VNIC_OPEN) { 2280 /* When we dropped rtnl, ibmvnic_open() got 2281 * it and noticed that we are resetting and 2282 * set the adapter state to OPEN. Update our 2283 * new "target" state, and resume the reset 2284 * from VNIC_CLOSING state. 2285 */ 2286 netdev_dbg(netdev, 2287 "Open changed state from %s, updating.\n", 2288 adapter_state_to_string(reset_state)); 2289 reset_state = VNIC_OPEN; 2290 adapter->state = VNIC_CLOSING; 2291 } 2292 2293 if (adapter->state != VNIC_CLOSING) { 2294 /* If someone else changed the adapter state 2295 * when we dropped the rtnl, fail the reset 2296 */ 2297 rc = -EAGAIN; 2298 goto out; 2299 } 2300 adapter->state = VNIC_CLOSED; 2301 } 2302 } 2303 2304 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2305 release_resources(adapter); 2306 release_sub_crqs(adapter, 1); 2307 release_crq_queue(adapter); 2308 } 2309 2310 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2311 /* remove the closed state so when we call open it appears 2312 * we are coming from the probed state. 2313 */ 2314 adapter->state = VNIC_PROBED; 2315 2316 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2317 rc = init_crq_queue(adapter); 2318 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2319 rc = ibmvnic_reenable_crq_queue(adapter); 2320 release_sub_crqs(adapter, 1); 2321 } else { 2322 rc = ibmvnic_reset_crq(adapter); 2323 if (rc == H_CLOSED || rc == H_SUCCESS) { 2324 rc = vio_enable_interrupts(adapter->vdev); 2325 if (rc) 2326 netdev_err(adapter->netdev, 2327 "Reset failed to enable interrupts. rc=%d\n", 2328 rc); 2329 } 2330 } 2331 2332 if (rc) { 2333 netdev_err(adapter->netdev, 2334 "Reset couldn't initialize crq. rc=%d\n", rc); 2335 goto out; 2336 } 2337 2338 rc = ibmvnic_reset_init(adapter, true); 2339 if (rc) 2340 goto out; 2341 2342 /* If the adapter was in PROBE or DOWN state prior to the reset, 2343 * exit here. 2344 */ 2345 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { 2346 rc = 0; 2347 goto out; 2348 } 2349 2350 rc = ibmvnic_login(netdev); 2351 if (rc) 2352 goto out; 2353 2354 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2355 rc = init_resources(adapter); 2356 if (rc) 2357 goto out; 2358 } else if (adapter->req_rx_queues != old_num_rx_queues || 2359 adapter->req_tx_queues != old_num_tx_queues || 2360 adapter->req_rx_add_entries_per_subcrq != 2361 old_num_rx_slots || 2362 adapter->req_tx_entries_per_subcrq != 2363 old_num_tx_slots || 2364 !adapter->rx_pool || 2365 !adapter->tso_pool || 2366 !adapter->tx_pool) { 2367 release_napi(adapter); 2368 release_vpd_data(adapter); 2369 2370 rc = init_resources(adapter); 2371 if (rc) 2372 goto out; 2373 2374 } else { 2375 rc = init_tx_pools(netdev); 2376 if (rc) { 2377 netdev_dbg(netdev, 2378 "init tx pools failed (%d)\n", 2379 rc); 2380 goto out; 2381 } 2382 2383 rc = init_rx_pools(netdev); 2384 if (rc) { 2385 netdev_dbg(netdev, 2386 "init rx pools failed (%d)\n", 2387 rc); 2388 goto out; 2389 } 2390 } 2391 ibmvnic_disable_irqs(adapter); 2392 } 2393 adapter->state = VNIC_CLOSED; 2394 2395 if (reset_state == VNIC_CLOSED) { 2396 rc = 0; 2397 goto out; 2398 } 2399 2400 rc = __ibmvnic_open(netdev); 2401 if (rc) { 2402 rc = IBMVNIC_OPEN_FAILED; 2403 goto out; 2404 } 2405 2406 /* refresh device's multicast list */ 2407 ibmvnic_set_multi(netdev); 2408 2409 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2410 adapter->reset_reason == VNIC_RESET_MOBILITY) 2411 __netdev_notify_peers(netdev); 2412 2413 rc = 0; 2414 2415 out: 2416 /* restore the adapter state if reset failed */ 2417 if (rc) 2418 adapter->state = reset_state; 2419 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 2420 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2421 rtnl_unlock(); 2422 2423 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 2424 adapter_state_to_string(adapter->state), 2425 adapter->failover_pending, rc); 2426 return rc; 2427 } 2428 2429 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2430 struct ibmvnic_rwi *rwi, u32 reset_state) 2431 { 2432 struct net_device *netdev = adapter->netdev; 2433 int rc; 2434 2435 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 2436 reset_reason_to_string(rwi->reset_reason)); 2437 2438 /* read the state and check (again) after getting rtnl */ 2439 reset_state = adapter->state; 2440 2441 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2442 rc = -EBUSY; 2443 goto out; 2444 } 2445 2446 netif_carrier_off(netdev); 2447 adapter->reset_reason = rwi->reset_reason; 2448 2449 ibmvnic_cleanup(netdev); 2450 release_resources(adapter); 2451 release_sub_crqs(adapter, 0); 2452 release_crq_queue(adapter); 2453 2454 /* remove the closed state so when we call open it appears 2455 * we are coming from the probed state. 2456 */ 2457 adapter->state = VNIC_PROBED; 2458 2459 reinit_completion(&adapter->init_done); 2460 rc = init_crq_queue(adapter); 2461 if (rc) { 2462 netdev_err(adapter->netdev, 2463 "Couldn't initialize crq. rc=%d\n", rc); 2464 goto out; 2465 } 2466 2467 rc = ibmvnic_reset_init(adapter, false); 2468 if (rc) 2469 goto out; 2470 2471 /* If the adapter was in PROBE or DOWN state prior to the reset, 2472 * exit here. 2473 */ 2474 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) 2475 goto out; 2476 2477 rc = ibmvnic_login(netdev); 2478 if (rc) 2479 goto out; 2480 2481 rc = init_resources(adapter); 2482 if (rc) 2483 goto out; 2484 2485 ibmvnic_disable_irqs(adapter); 2486 adapter->state = VNIC_CLOSED; 2487 2488 if (reset_state == VNIC_CLOSED) 2489 goto out; 2490 2491 rc = __ibmvnic_open(netdev); 2492 if (rc) { 2493 rc = IBMVNIC_OPEN_FAILED; 2494 goto out; 2495 } 2496 2497 __netdev_notify_peers(netdev); 2498 out: 2499 /* restore adapter state if reset failed */ 2500 if (rc) 2501 adapter->state = reset_state; 2502 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 2503 adapter_state_to_string(adapter->state), 2504 adapter->failover_pending, rc); 2505 return rc; 2506 } 2507 2508 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2509 { 2510 struct ibmvnic_rwi *rwi; 2511 unsigned long flags; 2512 2513 spin_lock_irqsave(&adapter->rwi_lock, flags); 2514 2515 if (!list_empty(&adapter->rwi_list)) { 2516 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2517 list); 2518 list_del(&rwi->list); 2519 } else { 2520 rwi = NULL; 2521 } 2522 2523 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2524 return rwi; 2525 } 2526 2527 /** 2528 * do_passive_init - complete probing when partner device is detected. 2529 * @adapter: ibmvnic_adapter struct 2530 * 2531 * If the ibmvnic device does not have a partner device to communicate with at boot 2532 * and that partner device comes online at a later time, this function is called 2533 * to complete the initialization process of ibmvnic device. 2534 * Caller is expected to hold rtnl_lock(). 2535 * 2536 * Returns non-zero if sub-CRQs are not initialized properly leaving the device 2537 * in the down state. 2538 * Returns 0 upon success and the device is in PROBED state. 2539 */ 2540 2541 static int do_passive_init(struct ibmvnic_adapter *adapter) 2542 { 2543 unsigned long timeout = msecs_to_jiffies(30000); 2544 struct net_device *netdev = adapter->netdev; 2545 struct device *dev = &adapter->vdev->dev; 2546 int rc; 2547 2548 netdev_dbg(netdev, "Partner device found, probing.\n"); 2549 2550 adapter->state = VNIC_PROBING; 2551 reinit_completion(&adapter->init_done); 2552 adapter->init_done_rc = 0; 2553 adapter->crq.active = true; 2554 2555 rc = send_crq_init_complete(adapter); 2556 if (rc) 2557 goto out; 2558 2559 rc = send_version_xchg(adapter); 2560 if (rc) 2561 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); 2562 2563 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 2564 dev_err(dev, "Initialization sequence timed out\n"); 2565 rc = -ETIMEDOUT; 2566 goto out; 2567 } 2568 2569 rc = init_sub_crqs(adapter); 2570 if (rc) { 2571 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); 2572 goto out; 2573 } 2574 2575 rc = init_sub_crq_irqs(adapter); 2576 if (rc) { 2577 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); 2578 goto init_failed; 2579 } 2580 2581 netdev->mtu = adapter->req_mtu - ETH_HLEN; 2582 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 2583 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 2584 2585 adapter->state = VNIC_PROBED; 2586 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); 2587 2588 return 0; 2589 2590 init_failed: 2591 release_sub_crqs(adapter, 1); 2592 out: 2593 adapter->state = VNIC_DOWN; 2594 return rc; 2595 } 2596 2597 static void __ibmvnic_reset(struct work_struct *work) 2598 { 2599 struct ibmvnic_adapter *adapter; 2600 bool saved_state = false; 2601 struct ibmvnic_rwi *tmprwi; 2602 struct ibmvnic_rwi *rwi; 2603 unsigned long flags; 2604 u32 reset_state; 2605 int num_fails = 0; 2606 int rc = 0; 2607 2608 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2609 2610 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2611 queue_delayed_work(system_long_wq, 2612 &adapter->ibmvnic_delayed_reset, 2613 IBMVNIC_RESET_DELAY); 2614 return; 2615 } 2616 2617 rwi = get_next_rwi(adapter); 2618 while (rwi) { 2619 spin_lock_irqsave(&adapter->state_lock, flags); 2620 2621 if (adapter->state == VNIC_REMOVING || 2622 adapter->state == VNIC_REMOVED) { 2623 spin_unlock_irqrestore(&adapter->state_lock, flags); 2624 kfree(rwi); 2625 rc = EBUSY; 2626 break; 2627 } 2628 2629 if (!saved_state) { 2630 reset_state = adapter->state; 2631 saved_state = true; 2632 } 2633 spin_unlock_irqrestore(&adapter->state_lock, flags); 2634 2635 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 2636 rtnl_lock(); 2637 rc = do_passive_init(adapter); 2638 rtnl_unlock(); 2639 if (!rc) 2640 netif_carrier_on(adapter->netdev); 2641 } else if (adapter->force_reset_recovery) { 2642 /* Since we are doing a hard reset now, clear the 2643 * failover_pending flag so we don't ignore any 2644 * future MOBILITY or other resets. 2645 */ 2646 adapter->failover_pending = false; 2647 2648 /* Transport event occurred during previous reset */ 2649 if (adapter->wait_for_reset) { 2650 /* Previous was CHANGE_PARAM; caller locked */ 2651 adapter->force_reset_recovery = false; 2652 rc = do_hard_reset(adapter, rwi, reset_state); 2653 } else { 2654 rtnl_lock(); 2655 adapter->force_reset_recovery = false; 2656 rc = do_hard_reset(adapter, rwi, reset_state); 2657 rtnl_unlock(); 2658 } 2659 if (rc) 2660 num_fails++; 2661 else 2662 num_fails = 0; 2663 2664 /* If auto-priority-failover is enabled we can get 2665 * back to back failovers during resets, resulting 2666 * in at least two failed resets (from high-priority 2667 * backing device to low-priority one and then back) 2668 * If resets continue to fail beyond that, give the 2669 * adapter some time to settle down before retrying. 2670 */ 2671 if (num_fails >= 3) { 2672 netdev_dbg(adapter->netdev, 2673 "[S:%s] Hard reset failed %d times, waiting 60 secs\n", 2674 adapter_state_to_string(adapter->state), 2675 num_fails); 2676 set_current_state(TASK_UNINTERRUPTIBLE); 2677 schedule_timeout(60 * HZ); 2678 } 2679 } else { 2680 rc = do_reset(adapter, rwi, reset_state); 2681 } 2682 tmprwi = rwi; 2683 adapter->last_reset_time = jiffies; 2684 2685 if (rc) 2686 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 2687 2688 rwi = get_next_rwi(adapter); 2689 2690 /* 2691 * If there is another reset queued, free the previous rwi 2692 * and process the new reset even if previous reset failed 2693 * (the previous reset could have failed because of a fail 2694 * over for instance, so process the fail over). 2695 * 2696 * If there are no resets queued and the previous reset failed, 2697 * the adapter would be in an undefined state. So retry the 2698 * previous reset as a hard reset. 2699 */ 2700 if (rwi) 2701 kfree(tmprwi); 2702 else if (rc) 2703 rwi = tmprwi; 2704 2705 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2706 rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) 2707 adapter->force_reset_recovery = true; 2708 } 2709 2710 if (adapter->wait_for_reset) { 2711 adapter->reset_done_rc = rc; 2712 complete(&adapter->reset_done); 2713 } 2714 2715 clear_bit_unlock(0, &adapter->resetting); 2716 2717 netdev_dbg(adapter->netdev, 2718 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 2719 adapter_state_to_string(adapter->state), 2720 adapter->force_reset_recovery, 2721 adapter->wait_for_reset); 2722 } 2723 2724 static void __ibmvnic_delayed_reset(struct work_struct *work) 2725 { 2726 struct ibmvnic_adapter *adapter; 2727 2728 adapter = container_of(work, struct ibmvnic_adapter, 2729 ibmvnic_delayed_reset.work); 2730 __ibmvnic_reset(&adapter->ibmvnic_reset); 2731 } 2732 2733 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2734 enum ibmvnic_reset_reason reason) 2735 { 2736 struct list_head *entry, *tmp_entry; 2737 struct ibmvnic_rwi *rwi, *tmp; 2738 struct net_device *netdev = adapter->netdev; 2739 unsigned long flags; 2740 int ret; 2741 2742 spin_lock_irqsave(&adapter->rwi_lock, flags); 2743 2744 /* If failover is pending don't schedule any other reset. 2745 * Instead let the failover complete. If there is already a 2746 * a failover reset scheduled, we will detect and drop the 2747 * duplicate reset when walking the ->rwi_list below. 2748 */ 2749 if (adapter->state == VNIC_REMOVING || 2750 adapter->state == VNIC_REMOVED || 2751 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2752 ret = EBUSY; 2753 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2754 goto err; 2755 } 2756 2757 if (adapter->state == VNIC_PROBING) { 2758 netdev_warn(netdev, "Adapter reset during probe\n"); 2759 adapter->init_done_rc = -EAGAIN; 2760 ret = EAGAIN; 2761 goto err; 2762 } 2763 2764 list_for_each_entry(tmp, &adapter->rwi_list, list) { 2765 if (tmp->reset_reason == reason) { 2766 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 2767 reset_reason_to_string(reason)); 2768 ret = EBUSY; 2769 goto err; 2770 } 2771 } 2772 2773 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2774 if (!rwi) { 2775 ret = ENOMEM; 2776 goto err; 2777 } 2778 /* if we just received a transport event, 2779 * flush reset queue and process this reset 2780 */ 2781 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2782 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2783 list_del(entry); 2784 } 2785 rwi->reset_reason = reason; 2786 list_add_tail(&rwi->list, &adapter->rwi_list); 2787 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 2788 reset_reason_to_string(reason)); 2789 queue_work(system_long_wq, &adapter->ibmvnic_reset); 2790 2791 ret = 0; 2792 err: 2793 /* ibmvnic_close() below can block, so drop the lock first */ 2794 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2795 2796 if (ret == ENOMEM) 2797 ibmvnic_close(netdev); 2798 2799 return -ret; 2800 } 2801 2802 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2803 { 2804 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2805 2806 if (test_bit(0, &adapter->resetting)) { 2807 netdev_err(adapter->netdev, 2808 "Adapter is resetting, skip timeout reset\n"); 2809 return; 2810 } 2811 /* No queuing up reset until at least 5 seconds (default watchdog val) 2812 * after last reset 2813 */ 2814 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 2815 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 2816 return; 2817 } 2818 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2819 } 2820 2821 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2822 struct ibmvnic_rx_buff *rx_buff) 2823 { 2824 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2825 2826 rx_buff->skb = NULL; 2827 2828 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2829 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2830 2831 atomic_dec(&pool->available); 2832 } 2833 2834 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2835 { 2836 struct ibmvnic_sub_crq_queue *rx_scrq; 2837 struct ibmvnic_adapter *adapter; 2838 struct net_device *netdev; 2839 int frames_processed; 2840 int scrq_num; 2841 2842 netdev = napi->dev; 2843 adapter = netdev_priv(netdev); 2844 scrq_num = (int)(napi - adapter->napi); 2845 frames_processed = 0; 2846 rx_scrq = adapter->rx_scrq[scrq_num]; 2847 2848 restart_poll: 2849 while (frames_processed < budget) { 2850 struct sk_buff *skb; 2851 struct ibmvnic_rx_buff *rx_buff; 2852 union sub_crq *next; 2853 u32 length; 2854 u16 offset; 2855 u8 flags = 0; 2856 2857 if (unlikely(test_bit(0, &adapter->resetting) && 2858 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2859 enable_scrq_irq(adapter, rx_scrq); 2860 napi_complete_done(napi, frames_processed); 2861 return frames_processed; 2862 } 2863 2864 if (!pending_scrq(adapter, rx_scrq)) 2865 break; 2866 next = ibmvnic_next_scrq(adapter, rx_scrq); 2867 rx_buff = (struct ibmvnic_rx_buff *) 2868 be64_to_cpu(next->rx_comp.correlator); 2869 /* do error checking */ 2870 if (next->rx_comp.rc) { 2871 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2872 be16_to_cpu(next->rx_comp.rc)); 2873 /* free the entry */ 2874 next->rx_comp.first = 0; 2875 dev_kfree_skb_any(rx_buff->skb); 2876 remove_buff_from_pool(adapter, rx_buff); 2877 continue; 2878 } else if (!rx_buff->skb) { 2879 /* free the entry */ 2880 next->rx_comp.first = 0; 2881 remove_buff_from_pool(adapter, rx_buff); 2882 continue; 2883 } 2884 2885 length = be32_to_cpu(next->rx_comp.len); 2886 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2887 flags = next->rx_comp.flags; 2888 skb = rx_buff->skb; 2889 /* load long_term_buff before copying to skb */ 2890 dma_rmb(); 2891 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2892 length); 2893 2894 /* VLAN Header has been stripped by the system firmware and 2895 * needs to be inserted by the driver 2896 */ 2897 if (adapter->rx_vlan_header_insertion && 2898 (flags & IBMVNIC_VLAN_STRIPPED)) 2899 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2900 ntohs(next->rx_comp.vlan_tci)); 2901 2902 /* free the entry */ 2903 next->rx_comp.first = 0; 2904 remove_buff_from_pool(adapter, rx_buff); 2905 2906 skb_put(skb, length); 2907 skb->protocol = eth_type_trans(skb, netdev); 2908 skb_record_rx_queue(skb, scrq_num); 2909 2910 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2911 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2912 skb->ip_summed = CHECKSUM_UNNECESSARY; 2913 } 2914 2915 length = skb->len; 2916 napi_gro_receive(napi, skb); /* send it up */ 2917 netdev->stats.rx_packets++; 2918 netdev->stats.rx_bytes += length; 2919 adapter->rx_stats_buffers[scrq_num].packets++; 2920 adapter->rx_stats_buffers[scrq_num].bytes += length; 2921 frames_processed++; 2922 } 2923 2924 if (adapter->state != VNIC_CLOSING && 2925 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 2926 adapter->req_rx_add_entries_per_subcrq / 2) || 2927 frames_processed < budget)) 2928 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2929 if (frames_processed < budget) { 2930 if (napi_complete_done(napi, frames_processed)) { 2931 enable_scrq_irq(adapter, rx_scrq); 2932 if (pending_scrq(adapter, rx_scrq)) { 2933 if (napi_reschedule(napi)) { 2934 disable_scrq_irq(adapter, rx_scrq); 2935 goto restart_poll; 2936 } 2937 } 2938 } 2939 } 2940 return frames_processed; 2941 } 2942 2943 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2944 { 2945 int rc, ret; 2946 2947 adapter->fallback.mtu = adapter->req_mtu; 2948 adapter->fallback.rx_queues = adapter->req_rx_queues; 2949 adapter->fallback.tx_queues = adapter->req_tx_queues; 2950 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2951 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2952 2953 reinit_completion(&adapter->reset_done); 2954 adapter->wait_for_reset = true; 2955 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2956 2957 if (rc) { 2958 ret = rc; 2959 goto out; 2960 } 2961 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2962 if (rc) { 2963 ret = -ENODEV; 2964 goto out; 2965 } 2966 2967 ret = 0; 2968 if (adapter->reset_done_rc) { 2969 ret = -EIO; 2970 adapter->desired.mtu = adapter->fallback.mtu; 2971 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2972 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2973 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2974 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2975 2976 reinit_completion(&adapter->reset_done); 2977 adapter->wait_for_reset = true; 2978 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2979 if (rc) { 2980 ret = rc; 2981 goto out; 2982 } 2983 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2984 60000); 2985 if (rc) { 2986 ret = -ENODEV; 2987 goto out; 2988 } 2989 } 2990 out: 2991 adapter->wait_for_reset = false; 2992 2993 return ret; 2994 } 2995 2996 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2997 { 2998 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2999 3000 adapter->desired.mtu = new_mtu + ETH_HLEN; 3001 3002 return wait_for_reset(adapter); 3003 } 3004 3005 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 3006 struct net_device *dev, 3007 netdev_features_t features) 3008 { 3009 /* Some backing hardware adapters can not 3010 * handle packets with a MSS less than 224 3011 * or with only one segment. 3012 */ 3013 if (skb_is_gso(skb)) { 3014 if (skb_shinfo(skb)->gso_size < 224 || 3015 skb_shinfo(skb)->gso_segs == 1) 3016 features &= ~NETIF_F_GSO_MASK; 3017 } 3018 3019 return features; 3020 } 3021 3022 static const struct net_device_ops ibmvnic_netdev_ops = { 3023 .ndo_open = ibmvnic_open, 3024 .ndo_stop = ibmvnic_close, 3025 .ndo_start_xmit = ibmvnic_xmit, 3026 .ndo_set_rx_mode = ibmvnic_set_multi, 3027 .ndo_set_mac_address = ibmvnic_set_mac, 3028 .ndo_validate_addr = eth_validate_addr, 3029 .ndo_tx_timeout = ibmvnic_tx_timeout, 3030 .ndo_change_mtu = ibmvnic_change_mtu, 3031 .ndo_features_check = ibmvnic_features_check, 3032 }; 3033 3034 /* ethtool functions */ 3035 3036 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 3037 struct ethtool_link_ksettings *cmd) 3038 { 3039 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3040 int rc; 3041 3042 rc = send_query_phys_parms(adapter); 3043 if (rc) { 3044 adapter->speed = SPEED_UNKNOWN; 3045 adapter->duplex = DUPLEX_UNKNOWN; 3046 } 3047 cmd->base.speed = adapter->speed; 3048 cmd->base.duplex = adapter->duplex; 3049 cmd->base.port = PORT_FIBRE; 3050 cmd->base.phy_address = 0; 3051 cmd->base.autoneg = AUTONEG_ENABLE; 3052 3053 return 0; 3054 } 3055 3056 static void ibmvnic_get_drvinfo(struct net_device *netdev, 3057 struct ethtool_drvinfo *info) 3058 { 3059 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3060 3061 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 3062 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 3063 strscpy(info->fw_version, adapter->fw_version, 3064 sizeof(info->fw_version)); 3065 } 3066 3067 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 3068 { 3069 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3070 3071 return adapter->msg_enable; 3072 } 3073 3074 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 3075 { 3076 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3077 3078 adapter->msg_enable = data; 3079 } 3080 3081 static u32 ibmvnic_get_link(struct net_device *netdev) 3082 { 3083 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3084 3085 /* Don't need to send a query because we request a logical link up at 3086 * init and then we wait for link state indications 3087 */ 3088 return adapter->logical_link_state; 3089 } 3090 3091 static void ibmvnic_get_ringparam(struct net_device *netdev, 3092 struct ethtool_ringparam *ring, 3093 struct kernel_ethtool_ringparam *kernel_ring, 3094 struct netlink_ext_ack *extack) 3095 { 3096 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3097 3098 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 3099 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 3100 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 3101 } else { 3102 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 3103 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 3104 } 3105 ring->rx_mini_max_pending = 0; 3106 ring->rx_jumbo_max_pending = 0; 3107 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 3108 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 3109 ring->rx_mini_pending = 0; 3110 ring->rx_jumbo_pending = 0; 3111 } 3112 3113 static int ibmvnic_set_ringparam(struct net_device *netdev, 3114 struct ethtool_ringparam *ring, 3115 struct kernel_ethtool_ringparam *kernel_ring, 3116 struct netlink_ext_ack *extack) 3117 { 3118 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3119 int ret; 3120 3121 ret = 0; 3122 adapter->desired.rx_entries = ring->rx_pending; 3123 adapter->desired.tx_entries = ring->tx_pending; 3124 3125 ret = wait_for_reset(adapter); 3126 3127 if (!ret && 3128 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 3129 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 3130 netdev_info(netdev, 3131 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 3132 ring->rx_pending, ring->tx_pending, 3133 adapter->req_rx_add_entries_per_subcrq, 3134 adapter->req_tx_entries_per_subcrq); 3135 return ret; 3136 } 3137 3138 static void ibmvnic_get_channels(struct net_device *netdev, 3139 struct ethtool_channels *channels) 3140 { 3141 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3142 3143 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 3144 channels->max_rx = adapter->max_rx_queues; 3145 channels->max_tx = adapter->max_tx_queues; 3146 } else { 3147 channels->max_rx = IBMVNIC_MAX_QUEUES; 3148 channels->max_tx = IBMVNIC_MAX_QUEUES; 3149 } 3150 3151 channels->max_other = 0; 3152 channels->max_combined = 0; 3153 channels->rx_count = adapter->req_rx_queues; 3154 channels->tx_count = adapter->req_tx_queues; 3155 channels->other_count = 0; 3156 channels->combined_count = 0; 3157 } 3158 3159 static int ibmvnic_set_channels(struct net_device *netdev, 3160 struct ethtool_channels *channels) 3161 { 3162 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3163 int ret; 3164 3165 ret = 0; 3166 adapter->desired.rx_queues = channels->rx_count; 3167 adapter->desired.tx_queues = channels->tx_count; 3168 3169 ret = wait_for_reset(adapter); 3170 3171 if (!ret && 3172 (adapter->req_rx_queues != channels->rx_count || 3173 adapter->req_tx_queues != channels->tx_count)) 3174 netdev_info(netdev, 3175 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 3176 channels->rx_count, channels->tx_count, 3177 adapter->req_rx_queues, adapter->req_tx_queues); 3178 return ret; 3179 } 3180 3181 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 3182 { 3183 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3184 int i; 3185 3186 switch (stringset) { 3187 case ETH_SS_STATS: 3188 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 3189 i++, data += ETH_GSTRING_LEN) 3190 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 3191 3192 for (i = 0; i < adapter->req_tx_queues; i++) { 3193 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 3194 data += ETH_GSTRING_LEN; 3195 3196 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 3197 data += ETH_GSTRING_LEN; 3198 3199 snprintf(data, ETH_GSTRING_LEN, 3200 "tx%d_dropped_packets", i); 3201 data += ETH_GSTRING_LEN; 3202 } 3203 3204 for (i = 0; i < adapter->req_rx_queues; i++) { 3205 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 3206 data += ETH_GSTRING_LEN; 3207 3208 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 3209 data += ETH_GSTRING_LEN; 3210 3211 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 3212 data += ETH_GSTRING_LEN; 3213 } 3214 break; 3215 3216 case ETH_SS_PRIV_FLAGS: 3217 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 3218 strcpy(data + i * ETH_GSTRING_LEN, 3219 ibmvnic_priv_flags[i]); 3220 break; 3221 default: 3222 return; 3223 } 3224 } 3225 3226 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3227 { 3228 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3229 3230 switch (sset) { 3231 case ETH_SS_STATS: 3232 return ARRAY_SIZE(ibmvnic_stats) + 3233 adapter->req_tx_queues * NUM_TX_STATS + 3234 adapter->req_rx_queues * NUM_RX_STATS; 3235 case ETH_SS_PRIV_FLAGS: 3236 return ARRAY_SIZE(ibmvnic_priv_flags); 3237 default: 3238 return -EOPNOTSUPP; 3239 } 3240 } 3241 3242 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3243 struct ethtool_stats *stats, u64 *data) 3244 { 3245 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3246 union ibmvnic_crq crq; 3247 int i, j; 3248 int rc; 3249 3250 memset(&crq, 0, sizeof(crq)); 3251 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3252 crq.request_statistics.cmd = REQUEST_STATISTICS; 3253 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3254 crq.request_statistics.len = 3255 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3256 3257 /* Wait for data to be written */ 3258 reinit_completion(&adapter->stats_done); 3259 rc = ibmvnic_send_crq(adapter, &crq); 3260 if (rc) 3261 return; 3262 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3263 if (rc) 3264 return; 3265 3266 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3267 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3268 (adapter, ibmvnic_stats[i].offset)); 3269 3270 for (j = 0; j < adapter->req_tx_queues; j++) { 3271 data[i] = adapter->tx_stats_buffers[j].packets; 3272 i++; 3273 data[i] = adapter->tx_stats_buffers[j].bytes; 3274 i++; 3275 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3276 i++; 3277 } 3278 3279 for (j = 0; j < adapter->req_rx_queues; j++) { 3280 data[i] = adapter->rx_stats_buffers[j].packets; 3281 i++; 3282 data[i] = adapter->rx_stats_buffers[j].bytes; 3283 i++; 3284 data[i] = adapter->rx_stats_buffers[j].interrupts; 3285 i++; 3286 } 3287 } 3288 3289 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 3290 { 3291 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3292 3293 return adapter->priv_flags; 3294 } 3295 3296 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 3297 { 3298 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3299 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 3300 3301 if (which_maxes) 3302 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 3303 else 3304 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 3305 3306 return 0; 3307 } 3308 3309 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3310 .get_drvinfo = ibmvnic_get_drvinfo, 3311 .get_msglevel = ibmvnic_get_msglevel, 3312 .set_msglevel = ibmvnic_set_msglevel, 3313 .get_link = ibmvnic_get_link, 3314 .get_ringparam = ibmvnic_get_ringparam, 3315 .set_ringparam = ibmvnic_set_ringparam, 3316 .get_channels = ibmvnic_get_channels, 3317 .set_channels = ibmvnic_set_channels, 3318 .get_strings = ibmvnic_get_strings, 3319 .get_sset_count = ibmvnic_get_sset_count, 3320 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3321 .get_link_ksettings = ibmvnic_get_link_ksettings, 3322 .get_priv_flags = ibmvnic_get_priv_flags, 3323 .set_priv_flags = ibmvnic_set_priv_flags, 3324 }; 3325 3326 /* Routines for managing CRQs/sCRQs */ 3327 3328 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3329 struct ibmvnic_sub_crq_queue *scrq) 3330 { 3331 int rc; 3332 3333 if (!scrq) { 3334 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3335 return -EINVAL; 3336 } 3337 3338 if (scrq->irq) { 3339 free_irq(scrq->irq, scrq); 3340 irq_dispose_mapping(scrq->irq); 3341 scrq->irq = 0; 3342 } 3343 3344 if (scrq->msgs) { 3345 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3346 atomic_set(&scrq->used, 0); 3347 scrq->cur = 0; 3348 scrq->ind_buf.index = 0; 3349 } else { 3350 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3351 return -EINVAL; 3352 } 3353 3354 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3355 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3356 return rc; 3357 } 3358 3359 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3360 { 3361 int i, rc; 3362 3363 if (!adapter->tx_scrq || !adapter->rx_scrq) 3364 return -EINVAL; 3365 3366 for (i = 0; i < adapter->req_tx_queues; i++) { 3367 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3368 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3369 if (rc) 3370 return rc; 3371 } 3372 3373 for (i = 0; i < adapter->req_rx_queues; i++) { 3374 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3375 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3376 if (rc) 3377 return rc; 3378 } 3379 3380 return rc; 3381 } 3382 3383 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3384 struct ibmvnic_sub_crq_queue *scrq, 3385 bool do_h_free) 3386 { 3387 struct device *dev = &adapter->vdev->dev; 3388 long rc; 3389 3390 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3391 3392 if (do_h_free) { 3393 /* Close the sub-crqs */ 3394 do { 3395 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3396 adapter->vdev->unit_address, 3397 scrq->crq_num); 3398 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3399 3400 if (rc) { 3401 netdev_err(adapter->netdev, 3402 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3403 scrq->crq_num, rc); 3404 } 3405 } 3406 3407 dma_free_coherent(dev, 3408 IBMVNIC_IND_ARR_SZ, 3409 scrq->ind_buf.indir_arr, 3410 scrq->ind_buf.indir_dma); 3411 3412 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3413 DMA_BIDIRECTIONAL); 3414 free_pages((unsigned long)scrq->msgs, 2); 3415 kfree(scrq); 3416 } 3417 3418 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3419 *adapter) 3420 { 3421 struct device *dev = &adapter->vdev->dev; 3422 struct ibmvnic_sub_crq_queue *scrq; 3423 int rc; 3424 3425 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3426 if (!scrq) 3427 return NULL; 3428 3429 scrq->msgs = 3430 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3431 if (!scrq->msgs) { 3432 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3433 goto zero_page_failed; 3434 } 3435 3436 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3437 DMA_BIDIRECTIONAL); 3438 if (dma_mapping_error(dev, scrq->msg_token)) { 3439 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3440 goto map_failed; 3441 } 3442 3443 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3444 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3445 3446 if (rc == H_RESOURCE) 3447 rc = ibmvnic_reset_crq(adapter); 3448 3449 if (rc == H_CLOSED) { 3450 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3451 } else if (rc) { 3452 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3453 goto reg_failed; 3454 } 3455 3456 scrq->adapter = adapter; 3457 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3458 scrq->ind_buf.index = 0; 3459 3460 scrq->ind_buf.indir_arr = 3461 dma_alloc_coherent(dev, 3462 IBMVNIC_IND_ARR_SZ, 3463 &scrq->ind_buf.indir_dma, 3464 GFP_KERNEL); 3465 3466 if (!scrq->ind_buf.indir_arr) 3467 goto indir_failed; 3468 3469 spin_lock_init(&scrq->lock); 3470 3471 netdev_dbg(adapter->netdev, 3472 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3473 scrq->crq_num, scrq->hw_irq, scrq->irq); 3474 3475 return scrq; 3476 3477 indir_failed: 3478 do { 3479 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3480 adapter->vdev->unit_address, 3481 scrq->crq_num); 3482 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3483 reg_failed: 3484 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3485 DMA_BIDIRECTIONAL); 3486 map_failed: 3487 free_pages((unsigned long)scrq->msgs, 2); 3488 zero_page_failed: 3489 kfree(scrq); 3490 3491 return NULL; 3492 } 3493 3494 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3495 { 3496 int i; 3497 3498 if (adapter->tx_scrq) { 3499 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3500 if (!adapter->tx_scrq[i]) 3501 continue; 3502 3503 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3504 i); 3505 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 3506 if (adapter->tx_scrq[i]->irq) { 3507 free_irq(adapter->tx_scrq[i]->irq, 3508 adapter->tx_scrq[i]); 3509 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3510 adapter->tx_scrq[i]->irq = 0; 3511 } 3512 3513 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3514 do_h_free); 3515 } 3516 3517 kfree(adapter->tx_scrq); 3518 adapter->tx_scrq = NULL; 3519 adapter->num_active_tx_scrqs = 0; 3520 } 3521 3522 if (adapter->rx_scrq) { 3523 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3524 if (!adapter->rx_scrq[i]) 3525 continue; 3526 3527 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3528 i); 3529 if (adapter->rx_scrq[i]->irq) { 3530 free_irq(adapter->rx_scrq[i]->irq, 3531 adapter->rx_scrq[i]); 3532 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3533 adapter->rx_scrq[i]->irq = 0; 3534 } 3535 3536 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3537 do_h_free); 3538 } 3539 3540 kfree(adapter->rx_scrq); 3541 adapter->rx_scrq = NULL; 3542 adapter->num_active_rx_scrqs = 0; 3543 } 3544 } 3545 3546 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3547 struct ibmvnic_sub_crq_queue *scrq) 3548 { 3549 struct device *dev = &adapter->vdev->dev; 3550 unsigned long rc; 3551 3552 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3553 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3554 if (rc) 3555 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3556 scrq->hw_irq, rc); 3557 return rc; 3558 } 3559 3560 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3561 struct ibmvnic_sub_crq_queue *scrq) 3562 { 3563 struct device *dev = &adapter->vdev->dev; 3564 unsigned long rc; 3565 3566 if (scrq->hw_irq > 0x100000000ULL) { 3567 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3568 return 1; 3569 } 3570 3571 if (test_bit(0, &adapter->resetting) && 3572 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3573 u64 val = (0xff000000) | scrq->hw_irq; 3574 3575 rc = plpar_hcall_norets(H_EOI, val); 3576 /* H_EOI would fail with rc = H_FUNCTION when running 3577 * in XIVE mode which is expected, but not an error. 3578 */ 3579 if (rc && (rc != H_FUNCTION)) 3580 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3581 val, rc); 3582 } 3583 3584 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3585 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3586 if (rc) 3587 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3588 scrq->hw_irq, rc); 3589 return rc; 3590 } 3591 3592 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3593 struct ibmvnic_sub_crq_queue *scrq) 3594 { 3595 struct device *dev = &adapter->vdev->dev; 3596 struct ibmvnic_tx_pool *tx_pool; 3597 struct ibmvnic_tx_buff *txbuff; 3598 struct netdev_queue *txq; 3599 union sub_crq *next; 3600 int index; 3601 int i; 3602 3603 restart_loop: 3604 while (pending_scrq(adapter, scrq)) { 3605 unsigned int pool = scrq->pool_index; 3606 int num_entries = 0; 3607 int total_bytes = 0; 3608 int num_packets = 0; 3609 3610 next = ibmvnic_next_scrq(adapter, scrq); 3611 for (i = 0; i < next->tx_comp.num_comps; i++) { 3612 index = be32_to_cpu(next->tx_comp.correlators[i]); 3613 if (index & IBMVNIC_TSO_POOL_MASK) { 3614 tx_pool = &adapter->tso_pool[pool]; 3615 index &= ~IBMVNIC_TSO_POOL_MASK; 3616 } else { 3617 tx_pool = &adapter->tx_pool[pool]; 3618 } 3619 3620 txbuff = &tx_pool->tx_buff[index]; 3621 num_packets++; 3622 num_entries += txbuff->num_entries; 3623 if (txbuff->skb) { 3624 total_bytes += txbuff->skb->len; 3625 if (next->tx_comp.rcs[i]) { 3626 dev_err(dev, "tx error %x\n", 3627 next->tx_comp.rcs[i]); 3628 dev_kfree_skb_irq(txbuff->skb); 3629 } else { 3630 dev_consume_skb_irq(txbuff->skb); 3631 } 3632 txbuff->skb = NULL; 3633 } else { 3634 netdev_warn(adapter->netdev, 3635 "TX completion received with NULL socket buffer\n"); 3636 } 3637 tx_pool->free_map[tx_pool->producer_index] = index; 3638 tx_pool->producer_index = 3639 (tx_pool->producer_index + 1) % 3640 tx_pool->num_buffers; 3641 } 3642 /* remove tx_comp scrq*/ 3643 next->tx_comp.first = 0; 3644 3645 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3646 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3647 3648 if (atomic_sub_return(num_entries, &scrq->used) <= 3649 (adapter->req_tx_entries_per_subcrq / 2) && 3650 __netif_subqueue_stopped(adapter->netdev, 3651 scrq->pool_index)) { 3652 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3653 netdev_dbg(adapter->netdev, "Started queue %d\n", 3654 scrq->pool_index); 3655 } 3656 } 3657 3658 enable_scrq_irq(adapter, scrq); 3659 3660 if (pending_scrq(adapter, scrq)) { 3661 disable_scrq_irq(adapter, scrq); 3662 goto restart_loop; 3663 } 3664 3665 return 0; 3666 } 3667 3668 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3669 { 3670 struct ibmvnic_sub_crq_queue *scrq = instance; 3671 struct ibmvnic_adapter *adapter = scrq->adapter; 3672 3673 disable_scrq_irq(adapter, scrq); 3674 ibmvnic_complete_tx(adapter, scrq); 3675 3676 return IRQ_HANDLED; 3677 } 3678 3679 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3680 { 3681 struct ibmvnic_sub_crq_queue *scrq = instance; 3682 struct ibmvnic_adapter *adapter = scrq->adapter; 3683 3684 /* When booting a kdump kernel we can hit pending interrupts 3685 * prior to completing driver initialization. 3686 */ 3687 if (unlikely(adapter->state != VNIC_OPEN)) 3688 return IRQ_NONE; 3689 3690 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3691 3692 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3693 disable_scrq_irq(adapter, scrq); 3694 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3695 } 3696 3697 return IRQ_HANDLED; 3698 } 3699 3700 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3701 { 3702 struct device *dev = &adapter->vdev->dev; 3703 struct ibmvnic_sub_crq_queue *scrq; 3704 int i = 0, j = 0; 3705 int rc = 0; 3706 3707 for (i = 0; i < adapter->req_tx_queues; i++) { 3708 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3709 i); 3710 scrq = adapter->tx_scrq[i]; 3711 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3712 3713 if (!scrq->irq) { 3714 rc = -EINVAL; 3715 dev_err(dev, "Error mapping irq\n"); 3716 goto req_tx_irq_failed; 3717 } 3718 3719 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3720 adapter->vdev->unit_address, i); 3721 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3722 0, scrq->name, scrq); 3723 3724 if (rc) { 3725 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3726 scrq->irq, rc); 3727 irq_dispose_mapping(scrq->irq); 3728 goto req_tx_irq_failed; 3729 } 3730 } 3731 3732 for (i = 0; i < adapter->req_rx_queues; i++) { 3733 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3734 i); 3735 scrq = adapter->rx_scrq[i]; 3736 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3737 if (!scrq->irq) { 3738 rc = -EINVAL; 3739 dev_err(dev, "Error mapping irq\n"); 3740 goto req_rx_irq_failed; 3741 } 3742 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3743 adapter->vdev->unit_address, i); 3744 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3745 0, scrq->name, scrq); 3746 if (rc) { 3747 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3748 scrq->irq, rc); 3749 irq_dispose_mapping(scrq->irq); 3750 goto req_rx_irq_failed; 3751 } 3752 } 3753 return rc; 3754 3755 req_rx_irq_failed: 3756 for (j = 0; j < i; j++) { 3757 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3758 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3759 } 3760 i = adapter->req_tx_queues; 3761 req_tx_irq_failed: 3762 for (j = 0; j < i; j++) { 3763 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3764 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3765 } 3766 release_sub_crqs(adapter, 1); 3767 return rc; 3768 } 3769 3770 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3771 { 3772 struct device *dev = &adapter->vdev->dev; 3773 struct ibmvnic_sub_crq_queue **allqueues; 3774 int registered_queues = 0; 3775 int total_queues; 3776 int more = 0; 3777 int i; 3778 3779 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3780 3781 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3782 if (!allqueues) 3783 return -ENOMEM; 3784 3785 for (i = 0; i < total_queues; i++) { 3786 allqueues[i] = init_sub_crq_queue(adapter); 3787 if (!allqueues[i]) { 3788 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3789 break; 3790 } 3791 registered_queues++; 3792 } 3793 3794 /* Make sure we were able to register the minimum number of queues */ 3795 if (registered_queues < 3796 adapter->min_tx_queues + adapter->min_rx_queues) { 3797 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3798 goto tx_failed; 3799 } 3800 3801 /* Distribute the failed allocated queues*/ 3802 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3803 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3804 switch (i % 3) { 3805 case 0: 3806 if (adapter->req_rx_queues > adapter->min_rx_queues) 3807 adapter->req_rx_queues--; 3808 else 3809 more++; 3810 break; 3811 case 1: 3812 if (adapter->req_tx_queues > adapter->min_tx_queues) 3813 adapter->req_tx_queues--; 3814 else 3815 more++; 3816 break; 3817 } 3818 } 3819 3820 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3821 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3822 if (!adapter->tx_scrq) 3823 goto tx_failed; 3824 3825 for (i = 0; i < adapter->req_tx_queues; i++) { 3826 adapter->tx_scrq[i] = allqueues[i]; 3827 adapter->tx_scrq[i]->pool_index = i; 3828 adapter->num_active_tx_scrqs++; 3829 } 3830 3831 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3832 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3833 if (!adapter->rx_scrq) 3834 goto rx_failed; 3835 3836 for (i = 0; i < adapter->req_rx_queues; i++) { 3837 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3838 adapter->rx_scrq[i]->scrq_num = i; 3839 adapter->num_active_rx_scrqs++; 3840 } 3841 3842 kfree(allqueues); 3843 return 0; 3844 3845 rx_failed: 3846 kfree(adapter->tx_scrq); 3847 adapter->tx_scrq = NULL; 3848 tx_failed: 3849 for (i = 0; i < registered_queues; i++) 3850 release_sub_crq_queue(adapter, allqueues[i], 1); 3851 kfree(allqueues); 3852 return -ENOMEM; 3853 } 3854 3855 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3856 { 3857 struct device *dev = &adapter->vdev->dev; 3858 union ibmvnic_crq crq; 3859 int max_entries; 3860 int cap_reqs; 3861 3862 /* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on 3863 * the PROMISC flag). Initialize this count upfront. When the tasklet 3864 * receives a response to all of these, it will send the next protocol 3865 * message (QUERY_IP_OFFLOAD). 3866 */ 3867 if (!(adapter->netdev->flags & IFF_PROMISC) || 3868 adapter->promisc_supported) 3869 cap_reqs = 7; 3870 else 3871 cap_reqs = 6; 3872 3873 if (!retry) { 3874 /* Sub-CRQ entries are 32 byte long */ 3875 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3876 3877 atomic_set(&adapter->running_cap_crqs, cap_reqs); 3878 3879 if (adapter->min_tx_entries_per_subcrq > entries_page || 3880 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3881 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3882 return; 3883 } 3884 3885 if (adapter->desired.mtu) 3886 adapter->req_mtu = adapter->desired.mtu; 3887 else 3888 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3889 3890 if (!adapter->desired.tx_entries) 3891 adapter->desired.tx_entries = 3892 adapter->max_tx_entries_per_subcrq; 3893 if (!adapter->desired.rx_entries) 3894 adapter->desired.rx_entries = 3895 adapter->max_rx_add_entries_per_subcrq; 3896 3897 max_entries = IBMVNIC_MAX_LTB_SIZE / 3898 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3899 3900 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3901 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3902 adapter->desired.tx_entries = max_entries; 3903 } 3904 3905 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3906 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3907 adapter->desired.rx_entries = max_entries; 3908 } 3909 3910 if (adapter->desired.tx_entries) 3911 adapter->req_tx_entries_per_subcrq = 3912 adapter->desired.tx_entries; 3913 else 3914 adapter->req_tx_entries_per_subcrq = 3915 adapter->max_tx_entries_per_subcrq; 3916 3917 if (adapter->desired.rx_entries) 3918 adapter->req_rx_add_entries_per_subcrq = 3919 adapter->desired.rx_entries; 3920 else 3921 adapter->req_rx_add_entries_per_subcrq = 3922 adapter->max_rx_add_entries_per_subcrq; 3923 3924 if (adapter->desired.tx_queues) 3925 adapter->req_tx_queues = 3926 adapter->desired.tx_queues; 3927 else 3928 adapter->req_tx_queues = 3929 adapter->opt_tx_comp_sub_queues; 3930 3931 if (adapter->desired.rx_queues) 3932 adapter->req_rx_queues = 3933 adapter->desired.rx_queues; 3934 else 3935 adapter->req_rx_queues = 3936 adapter->opt_rx_comp_queues; 3937 3938 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3939 } else { 3940 atomic_add(cap_reqs, &adapter->running_cap_crqs); 3941 } 3942 memset(&crq, 0, sizeof(crq)); 3943 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3944 crq.request_capability.cmd = REQUEST_CAPABILITY; 3945 3946 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3947 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3948 cap_reqs--; 3949 ibmvnic_send_crq(adapter, &crq); 3950 3951 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3952 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3953 cap_reqs--; 3954 ibmvnic_send_crq(adapter, &crq); 3955 3956 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3957 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3958 cap_reqs--; 3959 ibmvnic_send_crq(adapter, &crq); 3960 3961 crq.request_capability.capability = 3962 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3963 crq.request_capability.number = 3964 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3965 cap_reqs--; 3966 ibmvnic_send_crq(adapter, &crq); 3967 3968 crq.request_capability.capability = 3969 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3970 crq.request_capability.number = 3971 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3972 cap_reqs--; 3973 ibmvnic_send_crq(adapter, &crq); 3974 3975 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3976 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3977 cap_reqs--; 3978 ibmvnic_send_crq(adapter, &crq); 3979 3980 if (adapter->netdev->flags & IFF_PROMISC) { 3981 if (adapter->promisc_supported) { 3982 crq.request_capability.capability = 3983 cpu_to_be16(PROMISC_REQUESTED); 3984 crq.request_capability.number = cpu_to_be64(1); 3985 cap_reqs--; 3986 ibmvnic_send_crq(adapter, &crq); 3987 } 3988 } else { 3989 crq.request_capability.capability = 3990 cpu_to_be16(PROMISC_REQUESTED); 3991 crq.request_capability.number = cpu_to_be64(0); 3992 cap_reqs--; 3993 ibmvnic_send_crq(adapter, &crq); 3994 } 3995 3996 /* Keep at end to catch any discrepancy between expected and actual 3997 * CRQs sent. 3998 */ 3999 WARN_ON(cap_reqs != 0); 4000 } 4001 4002 static int pending_scrq(struct ibmvnic_adapter *adapter, 4003 struct ibmvnic_sub_crq_queue *scrq) 4004 { 4005 union sub_crq *entry = &scrq->msgs[scrq->cur]; 4006 int rc; 4007 4008 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 4009 4010 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4011 * contents of the SCRQ descriptor 4012 */ 4013 dma_rmb(); 4014 4015 return rc; 4016 } 4017 4018 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 4019 struct ibmvnic_sub_crq_queue *scrq) 4020 { 4021 union sub_crq *entry; 4022 unsigned long flags; 4023 4024 spin_lock_irqsave(&scrq->lock, flags); 4025 entry = &scrq->msgs[scrq->cur]; 4026 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4027 if (++scrq->cur == scrq->size) 4028 scrq->cur = 0; 4029 } else { 4030 entry = NULL; 4031 } 4032 spin_unlock_irqrestore(&scrq->lock, flags); 4033 4034 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4035 * contents of the SCRQ descriptor 4036 */ 4037 dma_rmb(); 4038 4039 return entry; 4040 } 4041 4042 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 4043 { 4044 struct ibmvnic_crq_queue *queue = &adapter->crq; 4045 union ibmvnic_crq *crq; 4046 4047 crq = &queue->msgs[queue->cur]; 4048 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4049 if (++queue->cur == queue->size) 4050 queue->cur = 0; 4051 } else { 4052 crq = NULL; 4053 } 4054 4055 return crq; 4056 } 4057 4058 static void print_subcrq_error(struct device *dev, int rc, const char *func) 4059 { 4060 switch (rc) { 4061 case H_PARAMETER: 4062 dev_warn_ratelimited(dev, 4063 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 4064 func, rc); 4065 break; 4066 case H_CLOSED: 4067 dev_warn_ratelimited(dev, 4068 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 4069 func, rc); 4070 break; 4071 default: 4072 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 4073 break; 4074 } 4075 } 4076 4077 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 4078 u64 remote_handle, u64 ioba, u64 num_entries) 4079 { 4080 unsigned int ua = adapter->vdev->unit_address; 4081 struct device *dev = &adapter->vdev->dev; 4082 int rc; 4083 4084 /* Make sure the hypervisor sees the complete request */ 4085 dma_wmb(); 4086 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 4087 cpu_to_be64(remote_handle), 4088 ioba, num_entries); 4089 4090 if (rc) 4091 print_subcrq_error(dev, rc, __func__); 4092 4093 return rc; 4094 } 4095 4096 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 4097 union ibmvnic_crq *crq) 4098 { 4099 unsigned int ua = adapter->vdev->unit_address; 4100 struct device *dev = &adapter->vdev->dev; 4101 u64 *u64_crq = (u64 *)crq; 4102 int rc; 4103 4104 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 4105 (unsigned long)cpu_to_be64(u64_crq[0]), 4106 (unsigned long)cpu_to_be64(u64_crq[1])); 4107 4108 if (!adapter->crq.active && 4109 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 4110 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 4111 return -EINVAL; 4112 } 4113 4114 /* Make sure the hypervisor sees the complete request */ 4115 dma_wmb(); 4116 4117 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 4118 cpu_to_be64(u64_crq[0]), 4119 cpu_to_be64(u64_crq[1])); 4120 4121 if (rc) { 4122 if (rc == H_CLOSED) { 4123 dev_warn(dev, "CRQ Queue closed\n"); 4124 /* do not reset, report the fail, wait for passive init from server */ 4125 } 4126 4127 dev_warn(dev, "Send error (rc=%d)\n", rc); 4128 } 4129 4130 return rc; 4131 } 4132 4133 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 4134 { 4135 struct device *dev = &adapter->vdev->dev; 4136 union ibmvnic_crq crq; 4137 int retries = 100; 4138 int rc; 4139 4140 memset(&crq, 0, sizeof(crq)); 4141 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 4142 crq.generic.cmd = IBMVNIC_CRQ_INIT; 4143 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 4144 4145 do { 4146 rc = ibmvnic_send_crq(adapter, &crq); 4147 if (rc != H_CLOSED) 4148 break; 4149 retries--; 4150 msleep(50); 4151 4152 } while (retries > 0); 4153 4154 if (rc) { 4155 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 4156 return rc; 4157 } 4158 4159 return 0; 4160 } 4161 4162 struct vnic_login_client_data { 4163 u8 type; 4164 __be16 len; 4165 char name[]; 4166 } __packed; 4167 4168 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 4169 { 4170 int len; 4171 4172 /* Calculate the amount of buffer space needed for the 4173 * vnic client data in the login buffer. There are four entries, 4174 * OS name, LPAR name, device name, and a null last entry. 4175 */ 4176 len = 4 * sizeof(struct vnic_login_client_data); 4177 len += 6; /* "Linux" plus NULL */ 4178 len += strlen(utsname()->nodename) + 1; 4179 len += strlen(adapter->netdev->name) + 1; 4180 4181 return len; 4182 } 4183 4184 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 4185 struct vnic_login_client_data *vlcd) 4186 { 4187 const char *os_name = "Linux"; 4188 int len; 4189 4190 /* Type 1 - LPAR OS */ 4191 vlcd->type = 1; 4192 len = strlen(os_name) + 1; 4193 vlcd->len = cpu_to_be16(len); 4194 strscpy(vlcd->name, os_name, len); 4195 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4196 4197 /* Type 2 - LPAR name */ 4198 vlcd->type = 2; 4199 len = strlen(utsname()->nodename) + 1; 4200 vlcd->len = cpu_to_be16(len); 4201 strscpy(vlcd->name, utsname()->nodename, len); 4202 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4203 4204 /* Type 3 - device name */ 4205 vlcd->type = 3; 4206 len = strlen(adapter->netdev->name) + 1; 4207 vlcd->len = cpu_to_be16(len); 4208 strscpy(vlcd->name, adapter->netdev->name, len); 4209 } 4210 4211 static int send_login(struct ibmvnic_adapter *adapter) 4212 { 4213 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 4214 struct ibmvnic_login_buffer *login_buffer; 4215 struct device *dev = &adapter->vdev->dev; 4216 struct vnic_login_client_data *vlcd; 4217 dma_addr_t rsp_buffer_token; 4218 dma_addr_t buffer_token; 4219 size_t rsp_buffer_size; 4220 union ibmvnic_crq crq; 4221 int client_data_len; 4222 size_t buffer_size; 4223 __be64 *tx_list_p; 4224 __be64 *rx_list_p; 4225 int rc; 4226 int i; 4227 4228 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4229 netdev_err(adapter->netdev, 4230 "RX or TX queues are not allocated, device login failed\n"); 4231 return -ENOMEM; 4232 } 4233 4234 release_login_buffer(adapter); 4235 release_login_rsp_buffer(adapter); 4236 4237 client_data_len = vnic_client_data_len(adapter); 4238 4239 buffer_size = 4240 sizeof(struct ibmvnic_login_buffer) + 4241 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4242 client_data_len; 4243 4244 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4245 if (!login_buffer) 4246 goto buf_alloc_failed; 4247 4248 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4249 DMA_TO_DEVICE); 4250 if (dma_mapping_error(dev, buffer_token)) { 4251 dev_err(dev, "Couldn't map login buffer\n"); 4252 goto buf_map_failed; 4253 } 4254 4255 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4256 sizeof(u64) * adapter->req_tx_queues + 4257 sizeof(u64) * adapter->req_rx_queues + 4258 sizeof(u64) * adapter->req_rx_queues + 4259 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4260 4261 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4262 if (!login_rsp_buffer) 4263 goto buf_rsp_alloc_failed; 4264 4265 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4266 rsp_buffer_size, DMA_FROM_DEVICE); 4267 if (dma_mapping_error(dev, rsp_buffer_token)) { 4268 dev_err(dev, "Couldn't map login rsp buffer\n"); 4269 goto buf_rsp_map_failed; 4270 } 4271 4272 adapter->login_buf = login_buffer; 4273 adapter->login_buf_token = buffer_token; 4274 adapter->login_buf_sz = buffer_size; 4275 adapter->login_rsp_buf = login_rsp_buffer; 4276 adapter->login_rsp_buf_token = rsp_buffer_token; 4277 adapter->login_rsp_buf_sz = rsp_buffer_size; 4278 4279 login_buffer->len = cpu_to_be32(buffer_size); 4280 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4281 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4282 login_buffer->off_txcomp_subcrqs = 4283 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4284 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4285 login_buffer->off_rxcomp_subcrqs = 4286 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4287 sizeof(u64) * adapter->req_tx_queues); 4288 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4289 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4290 4291 tx_list_p = (__be64 *)((char *)login_buffer + 4292 sizeof(struct ibmvnic_login_buffer)); 4293 rx_list_p = (__be64 *)((char *)login_buffer + 4294 sizeof(struct ibmvnic_login_buffer) + 4295 sizeof(u64) * adapter->req_tx_queues); 4296 4297 for (i = 0; i < adapter->req_tx_queues; i++) { 4298 if (adapter->tx_scrq[i]) { 4299 tx_list_p[i] = 4300 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4301 } 4302 } 4303 4304 for (i = 0; i < adapter->req_rx_queues; i++) { 4305 if (adapter->rx_scrq[i]) { 4306 rx_list_p[i] = 4307 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4308 } 4309 } 4310 4311 /* Insert vNIC login client data */ 4312 vlcd = (struct vnic_login_client_data *) 4313 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4314 login_buffer->client_data_offset = 4315 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4316 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4317 4318 vnic_add_client_data(adapter, vlcd); 4319 4320 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4321 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4322 netdev_dbg(adapter->netdev, "%016lx\n", 4323 ((unsigned long *)(adapter->login_buf))[i]); 4324 } 4325 4326 memset(&crq, 0, sizeof(crq)); 4327 crq.login.first = IBMVNIC_CRQ_CMD; 4328 crq.login.cmd = LOGIN; 4329 crq.login.ioba = cpu_to_be32(buffer_token); 4330 crq.login.len = cpu_to_be32(buffer_size); 4331 4332 adapter->login_pending = true; 4333 rc = ibmvnic_send_crq(adapter, &crq); 4334 if (rc) { 4335 adapter->login_pending = false; 4336 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4337 goto buf_rsp_map_failed; 4338 } 4339 4340 return 0; 4341 4342 buf_rsp_map_failed: 4343 kfree(login_rsp_buffer); 4344 adapter->login_rsp_buf = NULL; 4345 buf_rsp_alloc_failed: 4346 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 4347 buf_map_failed: 4348 kfree(login_buffer); 4349 adapter->login_buf = NULL; 4350 buf_alloc_failed: 4351 return -ENOMEM; 4352 } 4353 4354 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 4355 u32 len, u8 map_id) 4356 { 4357 union ibmvnic_crq crq; 4358 4359 memset(&crq, 0, sizeof(crq)); 4360 crq.request_map.first = IBMVNIC_CRQ_CMD; 4361 crq.request_map.cmd = REQUEST_MAP; 4362 crq.request_map.map_id = map_id; 4363 crq.request_map.ioba = cpu_to_be32(addr); 4364 crq.request_map.len = cpu_to_be32(len); 4365 return ibmvnic_send_crq(adapter, &crq); 4366 } 4367 4368 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 4369 { 4370 union ibmvnic_crq crq; 4371 4372 memset(&crq, 0, sizeof(crq)); 4373 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4374 crq.request_unmap.cmd = REQUEST_UNMAP; 4375 crq.request_unmap.map_id = map_id; 4376 return ibmvnic_send_crq(adapter, &crq); 4377 } 4378 4379 static void send_query_map(struct ibmvnic_adapter *adapter) 4380 { 4381 union ibmvnic_crq crq; 4382 4383 memset(&crq, 0, sizeof(crq)); 4384 crq.query_map.first = IBMVNIC_CRQ_CMD; 4385 crq.query_map.cmd = QUERY_MAP; 4386 ibmvnic_send_crq(adapter, &crq); 4387 } 4388 4389 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 4390 static void send_query_cap(struct ibmvnic_adapter *adapter) 4391 { 4392 union ibmvnic_crq crq; 4393 int cap_reqs; 4394 4395 /* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count 4396 * upfront. When the tasklet receives a response to all of these, it 4397 * can send out the next protocol messaage (REQUEST_CAPABILITY). 4398 */ 4399 cap_reqs = 25; 4400 4401 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4402 4403 memset(&crq, 0, sizeof(crq)); 4404 crq.query_capability.first = IBMVNIC_CRQ_CMD; 4405 crq.query_capability.cmd = QUERY_CAPABILITY; 4406 4407 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 4408 ibmvnic_send_crq(adapter, &crq); 4409 cap_reqs--; 4410 4411 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 4412 ibmvnic_send_crq(adapter, &crq); 4413 cap_reqs--; 4414 4415 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 4416 ibmvnic_send_crq(adapter, &crq); 4417 cap_reqs--; 4418 4419 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 4420 ibmvnic_send_crq(adapter, &crq); 4421 cap_reqs--; 4422 4423 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 4424 ibmvnic_send_crq(adapter, &crq); 4425 cap_reqs--; 4426 4427 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 4428 ibmvnic_send_crq(adapter, &crq); 4429 cap_reqs--; 4430 4431 crq.query_capability.capability = 4432 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 4433 ibmvnic_send_crq(adapter, &crq); 4434 cap_reqs--; 4435 4436 crq.query_capability.capability = 4437 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 4438 ibmvnic_send_crq(adapter, &crq); 4439 cap_reqs--; 4440 4441 crq.query_capability.capability = 4442 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 4443 ibmvnic_send_crq(adapter, &crq); 4444 cap_reqs--; 4445 4446 crq.query_capability.capability = 4447 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 4448 ibmvnic_send_crq(adapter, &crq); 4449 cap_reqs--; 4450 4451 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 4452 ibmvnic_send_crq(adapter, &crq); 4453 cap_reqs--; 4454 4455 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 4456 ibmvnic_send_crq(adapter, &crq); 4457 cap_reqs--; 4458 4459 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 4460 ibmvnic_send_crq(adapter, &crq); 4461 cap_reqs--; 4462 4463 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 4464 ibmvnic_send_crq(adapter, &crq); 4465 cap_reqs--; 4466 4467 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 4468 ibmvnic_send_crq(adapter, &crq); 4469 cap_reqs--; 4470 4471 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4472 ibmvnic_send_crq(adapter, &crq); 4473 cap_reqs--; 4474 4475 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4476 ibmvnic_send_crq(adapter, &crq); 4477 cap_reqs--; 4478 4479 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4480 ibmvnic_send_crq(adapter, &crq); 4481 cap_reqs--; 4482 4483 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4484 ibmvnic_send_crq(adapter, &crq); 4485 cap_reqs--; 4486 4487 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4488 ibmvnic_send_crq(adapter, &crq); 4489 cap_reqs--; 4490 4491 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4492 ibmvnic_send_crq(adapter, &crq); 4493 cap_reqs--; 4494 4495 crq.query_capability.capability = 4496 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4497 ibmvnic_send_crq(adapter, &crq); 4498 cap_reqs--; 4499 4500 crq.query_capability.capability = 4501 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4502 ibmvnic_send_crq(adapter, &crq); 4503 cap_reqs--; 4504 4505 crq.query_capability.capability = 4506 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4507 ibmvnic_send_crq(adapter, &crq); 4508 cap_reqs--; 4509 4510 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4511 4512 ibmvnic_send_crq(adapter, &crq); 4513 cap_reqs--; 4514 4515 /* Keep at end to catch any discrepancy between expected and actual 4516 * CRQs sent. 4517 */ 4518 WARN_ON(cap_reqs != 0); 4519 } 4520 4521 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4522 { 4523 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4524 struct device *dev = &adapter->vdev->dev; 4525 union ibmvnic_crq crq; 4526 4527 adapter->ip_offload_tok = 4528 dma_map_single(dev, 4529 &adapter->ip_offload_buf, 4530 buf_sz, 4531 DMA_FROM_DEVICE); 4532 4533 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4534 if (!firmware_has_feature(FW_FEATURE_CMO)) 4535 dev_err(dev, "Couldn't map offload buffer\n"); 4536 return; 4537 } 4538 4539 memset(&crq, 0, sizeof(crq)); 4540 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4541 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4542 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4543 crq.query_ip_offload.ioba = 4544 cpu_to_be32(adapter->ip_offload_tok); 4545 4546 ibmvnic_send_crq(adapter, &crq); 4547 } 4548 4549 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4550 { 4551 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4552 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4553 struct device *dev = &adapter->vdev->dev; 4554 netdev_features_t old_hw_features = 0; 4555 union ibmvnic_crq crq; 4556 4557 adapter->ip_offload_ctrl_tok = 4558 dma_map_single(dev, 4559 ctrl_buf, 4560 sizeof(adapter->ip_offload_ctrl), 4561 DMA_TO_DEVICE); 4562 4563 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4564 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4565 return; 4566 } 4567 4568 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4569 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4570 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4571 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4572 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4573 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4574 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4575 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4576 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4577 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4578 4579 /* large_rx disabled for now, additional features needed */ 4580 ctrl_buf->large_rx_ipv4 = 0; 4581 ctrl_buf->large_rx_ipv6 = 0; 4582 4583 if (adapter->state != VNIC_PROBING) { 4584 old_hw_features = adapter->netdev->hw_features; 4585 adapter->netdev->hw_features = 0; 4586 } 4587 4588 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4589 4590 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4591 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4592 4593 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4594 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4595 4596 if ((adapter->netdev->features & 4597 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4598 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4599 4600 if (buf->large_tx_ipv4) 4601 adapter->netdev->hw_features |= NETIF_F_TSO; 4602 if (buf->large_tx_ipv6) 4603 adapter->netdev->hw_features |= NETIF_F_TSO6; 4604 4605 if (adapter->state == VNIC_PROBING) { 4606 adapter->netdev->features |= adapter->netdev->hw_features; 4607 } else if (old_hw_features != adapter->netdev->hw_features) { 4608 netdev_features_t tmp = 0; 4609 4610 /* disable features no longer supported */ 4611 adapter->netdev->features &= adapter->netdev->hw_features; 4612 /* turn on features now supported if previously enabled */ 4613 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4614 adapter->netdev->hw_features; 4615 adapter->netdev->features |= 4616 tmp & adapter->netdev->wanted_features; 4617 } 4618 4619 memset(&crq, 0, sizeof(crq)); 4620 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4621 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4622 crq.control_ip_offload.len = 4623 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4624 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4625 ibmvnic_send_crq(adapter, &crq); 4626 } 4627 4628 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4629 struct ibmvnic_adapter *adapter) 4630 { 4631 struct device *dev = &adapter->vdev->dev; 4632 4633 if (crq->get_vpd_size_rsp.rc.code) { 4634 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4635 crq->get_vpd_size_rsp.rc.code); 4636 complete(&adapter->fw_done); 4637 return; 4638 } 4639 4640 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4641 complete(&adapter->fw_done); 4642 } 4643 4644 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4645 struct ibmvnic_adapter *adapter) 4646 { 4647 struct device *dev = &adapter->vdev->dev; 4648 unsigned char *substr = NULL; 4649 u8 fw_level_len = 0; 4650 4651 memset(adapter->fw_version, 0, 32); 4652 4653 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4654 DMA_FROM_DEVICE); 4655 4656 if (crq->get_vpd_rsp.rc.code) { 4657 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4658 crq->get_vpd_rsp.rc.code); 4659 goto complete; 4660 } 4661 4662 /* get the position of the firmware version info 4663 * located after the ASCII 'RM' substring in the buffer 4664 */ 4665 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4666 if (!substr) { 4667 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4668 goto complete; 4669 } 4670 4671 /* get length of firmware level ASCII substring */ 4672 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4673 fw_level_len = *(substr + 2); 4674 } else { 4675 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4676 goto complete; 4677 } 4678 4679 /* copy firmware version string from vpd into adapter */ 4680 if ((substr + 3 + fw_level_len) < 4681 (adapter->vpd->buff + adapter->vpd->len)) { 4682 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4683 } else { 4684 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4685 } 4686 4687 complete: 4688 if (adapter->fw_version[0] == '\0') 4689 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 4690 complete(&adapter->fw_done); 4691 } 4692 4693 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4694 { 4695 struct device *dev = &adapter->vdev->dev; 4696 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4697 int i; 4698 4699 dma_unmap_single(dev, adapter->ip_offload_tok, 4700 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4701 4702 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4703 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4704 netdev_dbg(adapter->netdev, "%016lx\n", 4705 ((unsigned long *)(buf))[i]); 4706 4707 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4708 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4709 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4710 buf->tcp_ipv4_chksum); 4711 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4712 buf->tcp_ipv6_chksum); 4713 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4714 buf->udp_ipv4_chksum); 4715 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4716 buf->udp_ipv6_chksum); 4717 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4718 buf->large_tx_ipv4); 4719 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4720 buf->large_tx_ipv6); 4721 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4722 buf->large_rx_ipv4); 4723 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4724 buf->large_rx_ipv6); 4725 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4726 buf->max_ipv4_header_size); 4727 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4728 buf->max_ipv6_header_size); 4729 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4730 buf->max_tcp_header_size); 4731 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4732 buf->max_udp_header_size); 4733 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4734 buf->max_large_tx_size); 4735 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4736 buf->max_large_rx_size); 4737 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4738 buf->ipv6_extension_header); 4739 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4740 buf->tcp_pseudosum_req); 4741 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4742 buf->num_ipv6_ext_headers); 4743 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4744 buf->off_ipv6_ext_headers); 4745 4746 send_control_ip_offload(adapter); 4747 } 4748 4749 static const char *ibmvnic_fw_err_cause(u16 cause) 4750 { 4751 switch (cause) { 4752 case ADAPTER_PROBLEM: 4753 return "adapter problem"; 4754 case BUS_PROBLEM: 4755 return "bus problem"; 4756 case FW_PROBLEM: 4757 return "firmware problem"; 4758 case DD_PROBLEM: 4759 return "device driver problem"; 4760 case EEH_RECOVERY: 4761 return "EEH recovery"; 4762 case FW_UPDATED: 4763 return "firmware updated"; 4764 case LOW_MEMORY: 4765 return "low Memory"; 4766 default: 4767 return "unknown"; 4768 } 4769 } 4770 4771 static void handle_error_indication(union ibmvnic_crq *crq, 4772 struct ibmvnic_adapter *adapter) 4773 { 4774 struct device *dev = &adapter->vdev->dev; 4775 u16 cause; 4776 4777 cause = be16_to_cpu(crq->error_indication.error_cause); 4778 4779 dev_warn_ratelimited(dev, 4780 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4781 crq->error_indication.flags 4782 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4783 ibmvnic_fw_err_cause(cause)); 4784 4785 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4786 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4787 else 4788 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4789 } 4790 4791 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4792 struct ibmvnic_adapter *adapter) 4793 { 4794 struct net_device *netdev = adapter->netdev; 4795 struct device *dev = &adapter->vdev->dev; 4796 long rc; 4797 4798 rc = crq->change_mac_addr_rsp.rc.code; 4799 if (rc) { 4800 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4801 goto out; 4802 } 4803 /* crq->change_mac_addr.mac_addr is the requested one 4804 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4805 */ 4806 eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]); 4807 ether_addr_copy(adapter->mac_addr, 4808 &crq->change_mac_addr_rsp.mac_addr[0]); 4809 out: 4810 complete(&adapter->fw_done); 4811 return rc; 4812 } 4813 4814 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4815 struct ibmvnic_adapter *adapter) 4816 { 4817 struct device *dev = &adapter->vdev->dev; 4818 u64 *req_value; 4819 char *name; 4820 4821 atomic_dec(&adapter->running_cap_crqs); 4822 netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n", 4823 atomic_read(&adapter->running_cap_crqs)); 4824 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4825 case REQ_TX_QUEUES: 4826 req_value = &adapter->req_tx_queues; 4827 name = "tx"; 4828 break; 4829 case REQ_RX_QUEUES: 4830 req_value = &adapter->req_rx_queues; 4831 name = "rx"; 4832 break; 4833 case REQ_RX_ADD_QUEUES: 4834 req_value = &adapter->req_rx_add_queues; 4835 name = "rx_add"; 4836 break; 4837 case REQ_TX_ENTRIES_PER_SUBCRQ: 4838 req_value = &adapter->req_tx_entries_per_subcrq; 4839 name = "tx_entries_per_subcrq"; 4840 break; 4841 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4842 req_value = &adapter->req_rx_add_entries_per_subcrq; 4843 name = "rx_add_entries_per_subcrq"; 4844 break; 4845 case REQ_MTU: 4846 req_value = &adapter->req_mtu; 4847 name = "mtu"; 4848 break; 4849 case PROMISC_REQUESTED: 4850 req_value = &adapter->promisc; 4851 name = "promisc"; 4852 break; 4853 default: 4854 dev_err(dev, "Got invalid cap request rsp %d\n", 4855 crq->request_capability.capability); 4856 return; 4857 } 4858 4859 switch (crq->request_capability_rsp.rc.code) { 4860 case SUCCESS: 4861 break; 4862 case PARTIALSUCCESS: 4863 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4864 *req_value, 4865 (long)be64_to_cpu(crq->request_capability_rsp.number), 4866 name); 4867 4868 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4869 REQ_MTU) { 4870 pr_err("mtu of %llu is not supported. Reverting.\n", 4871 *req_value); 4872 *req_value = adapter->fallback.mtu; 4873 } else { 4874 *req_value = 4875 be64_to_cpu(crq->request_capability_rsp.number); 4876 } 4877 4878 send_request_cap(adapter, 1); 4879 return; 4880 default: 4881 dev_err(dev, "Error %d in request cap rsp\n", 4882 crq->request_capability_rsp.rc.code); 4883 return; 4884 } 4885 4886 /* Done receiving requested capabilities, query IP offload support */ 4887 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4888 adapter->wait_capability = false; 4889 send_query_ip_offload(adapter); 4890 } 4891 } 4892 4893 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4894 struct ibmvnic_adapter *adapter) 4895 { 4896 struct device *dev = &adapter->vdev->dev; 4897 struct net_device *netdev = adapter->netdev; 4898 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4899 struct ibmvnic_login_buffer *login = adapter->login_buf; 4900 u64 *tx_handle_array; 4901 u64 *rx_handle_array; 4902 int num_tx_pools; 4903 int num_rx_pools; 4904 u64 *size_array; 4905 int i; 4906 4907 /* CHECK: Test/set of login_pending does not need to be atomic 4908 * because only ibmvnic_tasklet tests/clears this. 4909 */ 4910 if (!adapter->login_pending) { 4911 netdev_warn(netdev, "Ignoring unexpected login response\n"); 4912 return 0; 4913 } 4914 adapter->login_pending = false; 4915 4916 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4917 DMA_TO_DEVICE); 4918 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4919 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4920 4921 /* If the number of queues requested can't be allocated by the 4922 * server, the login response will return with code 1. We will need 4923 * to resend the login buffer with fewer queues requested. 4924 */ 4925 if (login_rsp_crq->generic.rc.code) { 4926 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4927 complete(&adapter->init_done); 4928 return 0; 4929 } 4930 4931 if (adapter->failover_pending) { 4932 adapter->init_done_rc = -EAGAIN; 4933 netdev_dbg(netdev, "Failover pending, ignoring login response\n"); 4934 complete(&adapter->init_done); 4935 /* login response buffer will be released on reset */ 4936 return 0; 4937 } 4938 4939 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4940 4941 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4942 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4943 netdev_dbg(adapter->netdev, "%016lx\n", 4944 ((unsigned long *)(adapter->login_rsp_buf))[i]); 4945 } 4946 4947 /* Sanity checks */ 4948 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4949 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4950 adapter->req_rx_add_queues != 4951 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4952 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4953 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4954 return -EIO; 4955 } 4956 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4957 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4958 /* variable buffer sizes are not supported, so just read the 4959 * first entry. 4960 */ 4961 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4962 4963 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4964 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4965 4966 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4967 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4968 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4969 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4970 4971 for (i = 0; i < num_tx_pools; i++) 4972 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4973 4974 for (i = 0; i < num_rx_pools; i++) 4975 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4976 4977 adapter->num_active_tx_scrqs = num_tx_pools; 4978 adapter->num_active_rx_scrqs = num_rx_pools; 4979 release_login_rsp_buffer(adapter); 4980 release_login_buffer(adapter); 4981 complete(&adapter->init_done); 4982 4983 return 0; 4984 } 4985 4986 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4987 struct ibmvnic_adapter *adapter) 4988 { 4989 struct device *dev = &adapter->vdev->dev; 4990 long rc; 4991 4992 rc = crq->request_unmap_rsp.rc.code; 4993 if (rc) 4994 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4995 } 4996 4997 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4998 struct ibmvnic_adapter *adapter) 4999 { 5000 struct net_device *netdev = adapter->netdev; 5001 struct device *dev = &adapter->vdev->dev; 5002 long rc; 5003 5004 rc = crq->query_map_rsp.rc.code; 5005 if (rc) { 5006 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 5007 return; 5008 } 5009 netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n", 5010 crq->query_map_rsp.page_size, 5011 __be32_to_cpu(crq->query_map_rsp.tot_pages), 5012 __be32_to_cpu(crq->query_map_rsp.free_pages)); 5013 } 5014 5015 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 5016 struct ibmvnic_adapter *adapter) 5017 { 5018 struct net_device *netdev = adapter->netdev; 5019 struct device *dev = &adapter->vdev->dev; 5020 long rc; 5021 5022 atomic_dec(&adapter->running_cap_crqs); 5023 netdev_dbg(netdev, "Outstanding queries: %d\n", 5024 atomic_read(&adapter->running_cap_crqs)); 5025 rc = crq->query_capability.rc.code; 5026 if (rc) { 5027 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 5028 goto out; 5029 } 5030 5031 switch (be16_to_cpu(crq->query_capability.capability)) { 5032 case MIN_TX_QUEUES: 5033 adapter->min_tx_queues = 5034 be64_to_cpu(crq->query_capability.number); 5035 netdev_dbg(netdev, "min_tx_queues = %lld\n", 5036 adapter->min_tx_queues); 5037 break; 5038 case MIN_RX_QUEUES: 5039 adapter->min_rx_queues = 5040 be64_to_cpu(crq->query_capability.number); 5041 netdev_dbg(netdev, "min_rx_queues = %lld\n", 5042 adapter->min_rx_queues); 5043 break; 5044 case MIN_RX_ADD_QUEUES: 5045 adapter->min_rx_add_queues = 5046 be64_to_cpu(crq->query_capability.number); 5047 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 5048 adapter->min_rx_add_queues); 5049 break; 5050 case MAX_TX_QUEUES: 5051 adapter->max_tx_queues = 5052 be64_to_cpu(crq->query_capability.number); 5053 netdev_dbg(netdev, "max_tx_queues = %lld\n", 5054 adapter->max_tx_queues); 5055 break; 5056 case MAX_RX_QUEUES: 5057 adapter->max_rx_queues = 5058 be64_to_cpu(crq->query_capability.number); 5059 netdev_dbg(netdev, "max_rx_queues = %lld\n", 5060 adapter->max_rx_queues); 5061 break; 5062 case MAX_RX_ADD_QUEUES: 5063 adapter->max_rx_add_queues = 5064 be64_to_cpu(crq->query_capability.number); 5065 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 5066 adapter->max_rx_add_queues); 5067 break; 5068 case MIN_TX_ENTRIES_PER_SUBCRQ: 5069 adapter->min_tx_entries_per_subcrq = 5070 be64_to_cpu(crq->query_capability.number); 5071 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 5072 adapter->min_tx_entries_per_subcrq); 5073 break; 5074 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 5075 adapter->min_rx_add_entries_per_subcrq = 5076 be64_to_cpu(crq->query_capability.number); 5077 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 5078 adapter->min_rx_add_entries_per_subcrq); 5079 break; 5080 case MAX_TX_ENTRIES_PER_SUBCRQ: 5081 adapter->max_tx_entries_per_subcrq = 5082 be64_to_cpu(crq->query_capability.number); 5083 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 5084 adapter->max_tx_entries_per_subcrq); 5085 break; 5086 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 5087 adapter->max_rx_add_entries_per_subcrq = 5088 be64_to_cpu(crq->query_capability.number); 5089 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 5090 adapter->max_rx_add_entries_per_subcrq); 5091 break; 5092 case TCP_IP_OFFLOAD: 5093 adapter->tcp_ip_offload = 5094 be64_to_cpu(crq->query_capability.number); 5095 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 5096 adapter->tcp_ip_offload); 5097 break; 5098 case PROMISC_SUPPORTED: 5099 adapter->promisc_supported = 5100 be64_to_cpu(crq->query_capability.number); 5101 netdev_dbg(netdev, "promisc_supported = %lld\n", 5102 adapter->promisc_supported); 5103 break; 5104 case MIN_MTU: 5105 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 5106 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5107 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 5108 break; 5109 case MAX_MTU: 5110 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 5111 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5112 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 5113 break; 5114 case MAX_MULTICAST_FILTERS: 5115 adapter->max_multicast_filters = 5116 be64_to_cpu(crq->query_capability.number); 5117 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 5118 adapter->max_multicast_filters); 5119 break; 5120 case VLAN_HEADER_INSERTION: 5121 adapter->vlan_header_insertion = 5122 be64_to_cpu(crq->query_capability.number); 5123 if (adapter->vlan_header_insertion) 5124 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 5125 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 5126 adapter->vlan_header_insertion); 5127 break; 5128 case RX_VLAN_HEADER_INSERTION: 5129 adapter->rx_vlan_header_insertion = 5130 be64_to_cpu(crq->query_capability.number); 5131 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 5132 adapter->rx_vlan_header_insertion); 5133 break; 5134 case MAX_TX_SG_ENTRIES: 5135 adapter->max_tx_sg_entries = 5136 be64_to_cpu(crq->query_capability.number); 5137 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 5138 adapter->max_tx_sg_entries); 5139 break; 5140 case RX_SG_SUPPORTED: 5141 adapter->rx_sg_supported = 5142 be64_to_cpu(crq->query_capability.number); 5143 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 5144 adapter->rx_sg_supported); 5145 break; 5146 case OPT_TX_COMP_SUB_QUEUES: 5147 adapter->opt_tx_comp_sub_queues = 5148 be64_to_cpu(crq->query_capability.number); 5149 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 5150 adapter->opt_tx_comp_sub_queues); 5151 break; 5152 case OPT_RX_COMP_QUEUES: 5153 adapter->opt_rx_comp_queues = 5154 be64_to_cpu(crq->query_capability.number); 5155 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 5156 adapter->opt_rx_comp_queues); 5157 break; 5158 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 5159 adapter->opt_rx_bufadd_q_per_rx_comp_q = 5160 be64_to_cpu(crq->query_capability.number); 5161 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 5162 adapter->opt_rx_bufadd_q_per_rx_comp_q); 5163 break; 5164 case OPT_TX_ENTRIES_PER_SUBCRQ: 5165 adapter->opt_tx_entries_per_subcrq = 5166 be64_to_cpu(crq->query_capability.number); 5167 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 5168 adapter->opt_tx_entries_per_subcrq); 5169 break; 5170 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 5171 adapter->opt_rxba_entries_per_subcrq = 5172 be64_to_cpu(crq->query_capability.number); 5173 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 5174 adapter->opt_rxba_entries_per_subcrq); 5175 break; 5176 case TX_RX_DESC_REQ: 5177 adapter->tx_rx_desc_req = crq->query_capability.number; 5178 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 5179 adapter->tx_rx_desc_req); 5180 break; 5181 5182 default: 5183 netdev_err(netdev, "Got invalid cap rsp %d\n", 5184 crq->query_capability.capability); 5185 } 5186 5187 out: 5188 if (atomic_read(&adapter->running_cap_crqs) == 0) { 5189 adapter->wait_capability = false; 5190 send_request_cap(adapter, 0); 5191 } 5192 } 5193 5194 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 5195 { 5196 union ibmvnic_crq crq; 5197 int rc; 5198 5199 memset(&crq, 0, sizeof(crq)); 5200 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 5201 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 5202 5203 mutex_lock(&adapter->fw_lock); 5204 adapter->fw_done_rc = 0; 5205 reinit_completion(&adapter->fw_done); 5206 5207 rc = ibmvnic_send_crq(adapter, &crq); 5208 if (rc) { 5209 mutex_unlock(&adapter->fw_lock); 5210 return rc; 5211 } 5212 5213 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 5214 if (rc) { 5215 mutex_unlock(&adapter->fw_lock); 5216 return rc; 5217 } 5218 5219 mutex_unlock(&adapter->fw_lock); 5220 return adapter->fw_done_rc ? -EIO : 0; 5221 } 5222 5223 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 5224 struct ibmvnic_adapter *adapter) 5225 { 5226 struct net_device *netdev = adapter->netdev; 5227 int rc; 5228 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 5229 5230 rc = crq->query_phys_parms_rsp.rc.code; 5231 if (rc) { 5232 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 5233 return rc; 5234 } 5235 switch (rspeed) { 5236 case IBMVNIC_10MBPS: 5237 adapter->speed = SPEED_10; 5238 break; 5239 case IBMVNIC_100MBPS: 5240 adapter->speed = SPEED_100; 5241 break; 5242 case IBMVNIC_1GBPS: 5243 adapter->speed = SPEED_1000; 5244 break; 5245 case IBMVNIC_10GBPS: 5246 adapter->speed = SPEED_10000; 5247 break; 5248 case IBMVNIC_25GBPS: 5249 adapter->speed = SPEED_25000; 5250 break; 5251 case IBMVNIC_40GBPS: 5252 adapter->speed = SPEED_40000; 5253 break; 5254 case IBMVNIC_50GBPS: 5255 adapter->speed = SPEED_50000; 5256 break; 5257 case IBMVNIC_100GBPS: 5258 adapter->speed = SPEED_100000; 5259 break; 5260 case IBMVNIC_200GBPS: 5261 adapter->speed = SPEED_200000; 5262 break; 5263 default: 5264 if (netif_carrier_ok(netdev)) 5265 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5266 adapter->speed = SPEED_UNKNOWN; 5267 } 5268 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5269 adapter->duplex = DUPLEX_FULL; 5270 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5271 adapter->duplex = DUPLEX_HALF; 5272 else 5273 adapter->duplex = DUPLEX_UNKNOWN; 5274 5275 return rc; 5276 } 5277 5278 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5279 struct ibmvnic_adapter *adapter) 5280 { 5281 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5282 struct net_device *netdev = adapter->netdev; 5283 struct device *dev = &adapter->vdev->dev; 5284 u64 *u64_crq = (u64 *)crq; 5285 long rc; 5286 5287 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5288 (unsigned long)cpu_to_be64(u64_crq[0]), 5289 (unsigned long)cpu_to_be64(u64_crq[1])); 5290 switch (gen_crq->first) { 5291 case IBMVNIC_CRQ_INIT_RSP: 5292 switch (gen_crq->cmd) { 5293 case IBMVNIC_CRQ_INIT: 5294 dev_info(dev, "Partner initialized\n"); 5295 adapter->from_passive_init = true; 5296 /* Discard any stale login responses from prev reset. 5297 * CHECK: should we clear even on INIT_COMPLETE? 5298 */ 5299 adapter->login_pending = false; 5300 5301 if (adapter->state == VNIC_DOWN) 5302 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5303 else 5304 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5305 5306 if (rc && rc != -EBUSY) { 5307 /* We were unable to schedule the failover 5308 * reset either because the adapter was still 5309 * probing (eg: during kexec) or we could not 5310 * allocate memory. Clear the failover_pending 5311 * flag since no one else will. We ignore 5312 * EBUSY because it means either FAILOVER reset 5313 * is already scheduled or the adapter is 5314 * being removed. 5315 */ 5316 netdev_err(netdev, 5317 "Error %ld scheduling failover reset\n", 5318 rc); 5319 adapter->failover_pending = false; 5320 } 5321 5322 if (!completion_done(&adapter->init_done)) { 5323 complete(&adapter->init_done); 5324 if (!adapter->init_done_rc) 5325 adapter->init_done_rc = -EAGAIN; 5326 } 5327 5328 break; 5329 case IBMVNIC_CRQ_INIT_COMPLETE: 5330 dev_info(dev, "Partner initialization complete\n"); 5331 adapter->crq.active = true; 5332 send_version_xchg(adapter); 5333 break; 5334 default: 5335 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 5336 } 5337 return; 5338 case IBMVNIC_CRQ_XPORT_EVENT: 5339 netif_carrier_off(netdev); 5340 adapter->crq.active = false; 5341 /* terminate any thread waiting for a response 5342 * from the device 5343 */ 5344 if (!completion_done(&adapter->fw_done)) { 5345 adapter->fw_done_rc = -EIO; 5346 complete(&adapter->fw_done); 5347 } 5348 if (!completion_done(&adapter->stats_done)) 5349 complete(&adapter->stats_done); 5350 if (test_bit(0, &adapter->resetting)) 5351 adapter->force_reset_recovery = true; 5352 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 5353 dev_info(dev, "Migrated, re-enabling adapter\n"); 5354 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 5355 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 5356 dev_info(dev, "Backing device failover detected\n"); 5357 adapter->failover_pending = true; 5358 } else { 5359 /* The adapter lost the connection */ 5360 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 5361 gen_crq->cmd); 5362 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5363 } 5364 return; 5365 case IBMVNIC_CRQ_CMD_RSP: 5366 break; 5367 default: 5368 dev_err(dev, "Got an invalid msg type 0x%02x\n", 5369 gen_crq->first); 5370 return; 5371 } 5372 5373 switch (gen_crq->cmd) { 5374 case VERSION_EXCHANGE_RSP: 5375 rc = crq->version_exchange_rsp.rc.code; 5376 if (rc) { 5377 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 5378 break; 5379 } 5380 ibmvnic_version = 5381 be16_to_cpu(crq->version_exchange_rsp.version); 5382 dev_info(dev, "Partner protocol version is %d\n", 5383 ibmvnic_version); 5384 send_query_cap(adapter); 5385 break; 5386 case QUERY_CAPABILITY_RSP: 5387 handle_query_cap_rsp(crq, adapter); 5388 break; 5389 case QUERY_MAP_RSP: 5390 handle_query_map_rsp(crq, adapter); 5391 break; 5392 case REQUEST_MAP_RSP: 5393 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 5394 complete(&adapter->fw_done); 5395 break; 5396 case REQUEST_UNMAP_RSP: 5397 handle_request_unmap_rsp(crq, adapter); 5398 break; 5399 case REQUEST_CAPABILITY_RSP: 5400 handle_request_cap_rsp(crq, adapter); 5401 break; 5402 case LOGIN_RSP: 5403 netdev_dbg(netdev, "Got Login Response\n"); 5404 handle_login_rsp(crq, adapter); 5405 break; 5406 case LOGICAL_LINK_STATE_RSP: 5407 netdev_dbg(netdev, 5408 "Got Logical Link State Response, state: %d rc: %d\n", 5409 crq->logical_link_state_rsp.link_state, 5410 crq->logical_link_state_rsp.rc.code); 5411 adapter->logical_link_state = 5412 crq->logical_link_state_rsp.link_state; 5413 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 5414 complete(&adapter->init_done); 5415 break; 5416 case LINK_STATE_INDICATION: 5417 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 5418 adapter->phys_link_state = 5419 crq->link_state_indication.phys_link_state; 5420 adapter->logical_link_state = 5421 crq->link_state_indication.logical_link_state; 5422 if (adapter->phys_link_state && adapter->logical_link_state) 5423 netif_carrier_on(netdev); 5424 else 5425 netif_carrier_off(netdev); 5426 break; 5427 case CHANGE_MAC_ADDR_RSP: 5428 netdev_dbg(netdev, "Got MAC address change Response\n"); 5429 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 5430 break; 5431 case ERROR_INDICATION: 5432 netdev_dbg(netdev, "Got Error Indication\n"); 5433 handle_error_indication(crq, adapter); 5434 break; 5435 case REQUEST_STATISTICS_RSP: 5436 netdev_dbg(netdev, "Got Statistics Response\n"); 5437 complete(&adapter->stats_done); 5438 break; 5439 case QUERY_IP_OFFLOAD_RSP: 5440 netdev_dbg(netdev, "Got Query IP offload Response\n"); 5441 handle_query_ip_offload_rsp(adapter); 5442 break; 5443 case MULTICAST_CTRL_RSP: 5444 netdev_dbg(netdev, "Got multicast control Response\n"); 5445 break; 5446 case CONTROL_IP_OFFLOAD_RSP: 5447 netdev_dbg(netdev, "Got Control IP offload Response\n"); 5448 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 5449 sizeof(adapter->ip_offload_ctrl), 5450 DMA_TO_DEVICE); 5451 complete(&adapter->init_done); 5452 break; 5453 case COLLECT_FW_TRACE_RSP: 5454 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 5455 complete(&adapter->fw_done); 5456 break; 5457 case GET_VPD_SIZE_RSP: 5458 handle_vpd_size_rsp(crq, adapter); 5459 break; 5460 case GET_VPD_RSP: 5461 handle_vpd_rsp(crq, adapter); 5462 break; 5463 case QUERY_PHYS_PARMS_RSP: 5464 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 5465 complete(&adapter->fw_done); 5466 break; 5467 default: 5468 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 5469 gen_crq->cmd); 5470 } 5471 } 5472 5473 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 5474 { 5475 struct ibmvnic_adapter *adapter = instance; 5476 5477 tasklet_schedule(&adapter->tasklet); 5478 return IRQ_HANDLED; 5479 } 5480 5481 static void ibmvnic_tasklet(struct tasklet_struct *t) 5482 { 5483 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 5484 struct ibmvnic_crq_queue *queue = &adapter->crq; 5485 union ibmvnic_crq *crq; 5486 unsigned long flags; 5487 bool done = false; 5488 5489 spin_lock_irqsave(&queue->lock, flags); 5490 while (!done) { 5491 /* Pull all the valid messages off the CRQ */ 5492 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5493 /* This barrier makes sure ibmvnic_next_crq()'s 5494 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 5495 * before ibmvnic_handle_crq()'s 5496 * switch(gen_crq->first) and switch(gen_crq->cmd). 5497 */ 5498 dma_rmb(); 5499 ibmvnic_handle_crq(crq, adapter); 5500 crq->generic.first = 0; 5501 } 5502 } 5503 /* if capabilities CRQ's were sent in this tasklet, the following 5504 * tasklet must wait until all responses are received 5505 */ 5506 if (atomic_read(&adapter->running_cap_crqs) != 0) 5507 adapter->wait_capability = true; 5508 spin_unlock_irqrestore(&queue->lock, flags); 5509 } 5510 5511 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5512 { 5513 struct vio_dev *vdev = adapter->vdev; 5514 int rc; 5515 5516 do { 5517 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5518 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5519 5520 if (rc) 5521 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5522 5523 return rc; 5524 } 5525 5526 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5527 { 5528 struct ibmvnic_crq_queue *crq = &adapter->crq; 5529 struct device *dev = &adapter->vdev->dev; 5530 struct vio_dev *vdev = adapter->vdev; 5531 int rc; 5532 5533 /* Close the CRQ */ 5534 do { 5535 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5536 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5537 5538 /* Clean out the queue */ 5539 if (!crq->msgs) 5540 return -EINVAL; 5541 5542 memset(crq->msgs, 0, PAGE_SIZE); 5543 crq->cur = 0; 5544 crq->active = false; 5545 5546 /* And re-open it again */ 5547 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5548 crq->msg_token, PAGE_SIZE); 5549 5550 if (rc == H_CLOSED) 5551 /* Adapter is good, but other end is not ready */ 5552 dev_warn(dev, "Partner adapter not ready\n"); 5553 else if (rc != 0) 5554 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5555 5556 return rc; 5557 } 5558 5559 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5560 { 5561 struct ibmvnic_crq_queue *crq = &adapter->crq; 5562 struct vio_dev *vdev = adapter->vdev; 5563 long rc; 5564 5565 if (!crq->msgs) 5566 return; 5567 5568 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5569 free_irq(vdev->irq, adapter); 5570 tasklet_kill(&adapter->tasklet); 5571 do { 5572 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5573 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5574 5575 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5576 DMA_BIDIRECTIONAL); 5577 free_page((unsigned long)crq->msgs); 5578 crq->msgs = NULL; 5579 crq->active = false; 5580 } 5581 5582 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5583 { 5584 struct ibmvnic_crq_queue *crq = &adapter->crq; 5585 struct device *dev = &adapter->vdev->dev; 5586 struct vio_dev *vdev = adapter->vdev; 5587 int rc, retrc = -ENOMEM; 5588 5589 if (crq->msgs) 5590 return 0; 5591 5592 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5593 /* Should we allocate more than one page? */ 5594 5595 if (!crq->msgs) 5596 return -ENOMEM; 5597 5598 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5599 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5600 DMA_BIDIRECTIONAL); 5601 if (dma_mapping_error(dev, crq->msg_token)) 5602 goto map_failed; 5603 5604 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5605 crq->msg_token, PAGE_SIZE); 5606 5607 if (rc == H_RESOURCE) 5608 /* maybe kexecing and resource is busy. try a reset */ 5609 rc = ibmvnic_reset_crq(adapter); 5610 retrc = rc; 5611 5612 if (rc == H_CLOSED) { 5613 dev_warn(dev, "Partner adapter not ready\n"); 5614 } else if (rc) { 5615 dev_warn(dev, "Error %d opening adapter\n", rc); 5616 goto reg_crq_failed; 5617 } 5618 5619 retrc = 0; 5620 5621 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5622 5623 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5624 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5625 adapter->vdev->unit_address); 5626 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5627 if (rc) { 5628 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5629 vdev->irq, rc); 5630 goto req_irq_failed; 5631 } 5632 5633 rc = vio_enable_interrupts(vdev); 5634 if (rc) { 5635 dev_err(dev, "Error %d enabling interrupts\n", rc); 5636 goto req_irq_failed; 5637 } 5638 5639 crq->cur = 0; 5640 spin_lock_init(&crq->lock); 5641 5642 /* process any CRQs that were queued before we enabled interrupts */ 5643 tasklet_schedule(&adapter->tasklet); 5644 5645 return retrc; 5646 5647 req_irq_failed: 5648 tasklet_kill(&adapter->tasklet); 5649 do { 5650 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5651 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5652 reg_crq_failed: 5653 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5654 map_failed: 5655 free_page((unsigned long)crq->msgs); 5656 crq->msgs = NULL; 5657 return retrc; 5658 } 5659 5660 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5661 { 5662 struct device *dev = &adapter->vdev->dev; 5663 unsigned long timeout = msecs_to_jiffies(20000); 5664 u64 old_num_rx_queues = adapter->req_rx_queues; 5665 u64 old_num_tx_queues = adapter->req_tx_queues; 5666 int rc; 5667 5668 adapter->from_passive_init = false; 5669 5670 if (reset) 5671 reinit_completion(&adapter->init_done); 5672 5673 adapter->init_done_rc = 0; 5674 rc = ibmvnic_send_crq_init(adapter); 5675 if (rc) { 5676 dev_err(dev, "Send crq init failed with error %d\n", rc); 5677 return rc; 5678 } 5679 5680 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5681 dev_err(dev, "Initialization sequence timed out\n"); 5682 return -ETIMEDOUT; 5683 } 5684 5685 if (adapter->init_done_rc) { 5686 release_crq_queue(adapter); 5687 return adapter->init_done_rc; 5688 } 5689 5690 if (adapter->from_passive_init) { 5691 adapter->state = VNIC_OPEN; 5692 adapter->from_passive_init = false; 5693 return -EINVAL; 5694 } 5695 5696 if (reset && 5697 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5698 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5699 if (adapter->req_rx_queues != old_num_rx_queues || 5700 adapter->req_tx_queues != old_num_tx_queues) { 5701 release_sub_crqs(adapter, 0); 5702 rc = init_sub_crqs(adapter); 5703 } else { 5704 rc = reset_sub_crq_queues(adapter); 5705 } 5706 } else { 5707 rc = init_sub_crqs(adapter); 5708 } 5709 5710 if (rc) { 5711 dev_err(dev, "Initialization of sub crqs failed\n"); 5712 release_crq_queue(adapter); 5713 return rc; 5714 } 5715 5716 rc = init_sub_crq_irqs(adapter); 5717 if (rc) { 5718 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5719 release_crq_queue(adapter); 5720 } 5721 5722 return rc; 5723 } 5724 5725 static struct device_attribute dev_attr_failover; 5726 5727 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5728 { 5729 struct ibmvnic_adapter *adapter; 5730 struct net_device *netdev; 5731 unsigned char *mac_addr_p; 5732 bool init_success; 5733 int rc; 5734 5735 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5736 dev->unit_address); 5737 5738 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5739 VETH_MAC_ADDR, NULL); 5740 if (!mac_addr_p) { 5741 dev_err(&dev->dev, 5742 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5743 __FILE__, __LINE__); 5744 return 0; 5745 } 5746 5747 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5748 IBMVNIC_MAX_QUEUES); 5749 if (!netdev) 5750 return -ENOMEM; 5751 5752 adapter = netdev_priv(netdev); 5753 adapter->state = VNIC_PROBING; 5754 dev_set_drvdata(&dev->dev, netdev); 5755 adapter->vdev = dev; 5756 adapter->netdev = netdev; 5757 adapter->login_pending = false; 5758 memset(&adapter->map_ids, 0, sizeof(adapter->map_ids)); 5759 /* map_ids start at 1, so ensure map_id 0 is always "in-use" */ 5760 bitmap_set(adapter->map_ids, 0, 1); 5761 5762 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5763 eth_hw_addr_set(netdev, adapter->mac_addr); 5764 netdev->irq = dev->irq; 5765 netdev->netdev_ops = &ibmvnic_netdev_ops; 5766 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5767 SET_NETDEV_DEV(netdev, &dev->dev); 5768 5769 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5770 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5771 __ibmvnic_delayed_reset); 5772 INIT_LIST_HEAD(&adapter->rwi_list); 5773 spin_lock_init(&adapter->rwi_lock); 5774 spin_lock_init(&adapter->state_lock); 5775 mutex_init(&adapter->fw_lock); 5776 init_completion(&adapter->init_done); 5777 init_completion(&adapter->fw_done); 5778 init_completion(&adapter->reset_done); 5779 init_completion(&adapter->stats_done); 5780 clear_bit(0, &adapter->resetting); 5781 adapter->prev_rx_buf_sz = 0; 5782 adapter->prev_mtu = 0; 5783 5784 init_success = false; 5785 do { 5786 rc = init_crq_queue(adapter); 5787 if (rc) { 5788 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5789 rc); 5790 goto ibmvnic_init_fail; 5791 } 5792 5793 rc = ibmvnic_reset_init(adapter, false); 5794 } while (rc == -EAGAIN); 5795 5796 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 5797 * partner is not ready. CRQ is not active. When the partner becomes 5798 * ready, we will do the passive init reset. 5799 */ 5800 5801 if (!rc) 5802 init_success = true; 5803 5804 rc = init_stats_buffers(adapter); 5805 if (rc) 5806 goto ibmvnic_init_fail; 5807 5808 rc = init_stats_token(adapter); 5809 if (rc) 5810 goto ibmvnic_stats_fail; 5811 5812 rc = device_create_file(&dev->dev, &dev_attr_failover); 5813 if (rc) 5814 goto ibmvnic_dev_file_err; 5815 5816 netif_carrier_off(netdev); 5817 rc = register_netdev(netdev); 5818 if (rc) { 5819 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5820 goto ibmvnic_register_fail; 5821 } 5822 dev_info(&dev->dev, "ibmvnic registered\n"); 5823 5824 if (init_success) { 5825 adapter->state = VNIC_PROBED; 5826 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5827 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5828 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5829 } else { 5830 adapter->state = VNIC_DOWN; 5831 } 5832 5833 adapter->wait_for_reset = false; 5834 adapter->last_reset_time = jiffies; 5835 return 0; 5836 5837 ibmvnic_register_fail: 5838 device_remove_file(&dev->dev, &dev_attr_failover); 5839 5840 ibmvnic_dev_file_err: 5841 release_stats_token(adapter); 5842 5843 ibmvnic_stats_fail: 5844 release_stats_buffers(adapter); 5845 5846 ibmvnic_init_fail: 5847 release_sub_crqs(adapter, 1); 5848 release_crq_queue(adapter); 5849 mutex_destroy(&adapter->fw_lock); 5850 free_netdev(netdev); 5851 5852 return rc; 5853 } 5854 5855 static void ibmvnic_remove(struct vio_dev *dev) 5856 { 5857 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5858 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5859 unsigned long flags; 5860 5861 spin_lock_irqsave(&adapter->state_lock, flags); 5862 5863 /* If ibmvnic_reset() is scheduling a reset, wait for it to 5864 * finish. Then, set the state to REMOVING to prevent it from 5865 * scheduling any more work and to have reset functions ignore 5866 * any resets that have already been scheduled. Drop the lock 5867 * after setting state, so __ibmvnic_reset() which is called 5868 * from the flush_work() below, can make progress. 5869 */ 5870 spin_lock(&adapter->rwi_lock); 5871 adapter->state = VNIC_REMOVING; 5872 spin_unlock(&adapter->rwi_lock); 5873 5874 spin_unlock_irqrestore(&adapter->state_lock, flags); 5875 5876 flush_work(&adapter->ibmvnic_reset); 5877 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5878 5879 rtnl_lock(); 5880 unregister_netdevice(netdev); 5881 5882 release_resources(adapter); 5883 release_rx_pools(adapter); 5884 release_tx_pools(adapter); 5885 release_sub_crqs(adapter, 1); 5886 release_crq_queue(adapter); 5887 5888 release_stats_token(adapter); 5889 release_stats_buffers(adapter); 5890 5891 adapter->state = VNIC_REMOVED; 5892 5893 rtnl_unlock(); 5894 mutex_destroy(&adapter->fw_lock); 5895 device_remove_file(&dev->dev, &dev_attr_failover); 5896 free_netdev(netdev); 5897 dev_set_drvdata(&dev->dev, NULL); 5898 } 5899 5900 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5901 const char *buf, size_t count) 5902 { 5903 struct net_device *netdev = dev_get_drvdata(dev); 5904 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5905 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5906 __be64 session_token; 5907 long rc; 5908 5909 if (!sysfs_streq(buf, "1")) 5910 return -EINVAL; 5911 5912 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5913 H_GET_SESSION_TOKEN, 0, 0, 0); 5914 if (rc) { 5915 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5916 rc); 5917 goto last_resort; 5918 } 5919 5920 session_token = (__be64)retbuf[0]; 5921 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5922 be64_to_cpu(session_token)); 5923 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5924 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5925 if (rc) 5926 netdev_err(netdev, 5927 "H_VIOCTL initiated failover failed, rc %ld\n", 5928 rc); 5929 5930 last_resort: 5931 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 5932 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5933 5934 return count; 5935 } 5936 static DEVICE_ATTR_WO(failover); 5937 5938 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5939 { 5940 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5941 struct ibmvnic_adapter *adapter; 5942 struct iommu_table *tbl; 5943 unsigned long ret = 0; 5944 int i; 5945 5946 tbl = get_iommu_table_base(&vdev->dev); 5947 5948 /* netdev inits at probe time along with the structures we need below*/ 5949 if (!netdev) 5950 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5951 5952 adapter = netdev_priv(netdev); 5953 5954 ret += PAGE_SIZE; /* the crq message queue */ 5955 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5956 5957 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5958 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5959 5960 for (i = 0; i < adapter->num_active_rx_pools; i++) 5961 ret += adapter->rx_pool[i].size * 5962 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5963 5964 return ret; 5965 } 5966 5967 static int ibmvnic_resume(struct device *dev) 5968 { 5969 struct net_device *netdev = dev_get_drvdata(dev); 5970 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5971 5972 if (adapter->state != VNIC_OPEN) 5973 return 0; 5974 5975 tasklet_schedule(&adapter->tasklet); 5976 5977 return 0; 5978 } 5979 5980 static const struct vio_device_id ibmvnic_device_table[] = { 5981 {"network", "IBM,vnic"}, 5982 {"", "" } 5983 }; 5984 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5985 5986 static const struct dev_pm_ops ibmvnic_pm_ops = { 5987 .resume = ibmvnic_resume 5988 }; 5989 5990 static struct vio_driver ibmvnic_driver = { 5991 .id_table = ibmvnic_device_table, 5992 .probe = ibmvnic_probe, 5993 .remove = ibmvnic_remove, 5994 .get_desired_dma = ibmvnic_get_desired_dma, 5995 .name = ibmvnic_driver_name, 5996 .pm = &ibmvnic_pm_ops, 5997 }; 5998 5999 /* module functions */ 6000 static int __init ibmvnic_module_init(void) 6001 { 6002 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 6003 IBMVNIC_DRIVER_VERSION); 6004 6005 return vio_register_driver(&ibmvnic_driver); 6006 } 6007 6008 static void __exit ibmvnic_module_exit(void) 6009 { 6010 vio_unregister_driver(&ibmvnic_driver); 6011 } 6012 6013 module_init(ibmvnic_module_init); 6014 module_exit(ibmvnic_module_exit); 6015